PAGE 1
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
IMPORTANT SAFETY NOTICE — “For Technicians only”
This service data sheet is intended for use by persons having electrical, electronic, and
mechanical experience and knowledge at a level generally considered acceptable in the
appliance repair trade. Any attempt to repair a major appliance may result in personal injury
and property damage. The manufacturer or seller cannot be responsible, nor assume any
liability for injury or damage of any kind arising from the use of this data sheet.
Whirlpool Control Panel ........................................ 2
Diagnostic Guide .................................................. 3
Service Diagnostics ............................................. 3
Error Diagnostic ................................................... 4
Component Activation .......................................... 5
System Info ......................................................... 5
Fault/Error Codes ................................................. 7
Contents
Troubleshooting Guide .......................................... 8
Troubleshooting Tests........................................... 9
Strip Circuits ...................................................... 22
Dryer Disassembly Instructions .......................... 23
Wiring Diagrams .......................................... 25, 26
Component Locations ........................................ 27
Specifications .................................................... 27
PART NO. W10410465A
IMPORTANT: Electrostatic Discharge (ESD) Sensitive Electronics
ESD problems are present everywhere. Most people begin to feel an ESD discharge at
approximately 3000V. It takes as little as 10V to destroy, damage, or weaken the main control
assembly. The new main control assembly may appear to work well after repair is finished,
but a malfunction may occur at a later date due to ESD stress.
Use an anti-static wrist strap. Connect wrist strap to green ground connection point or
unpainted metal in the appliance
-OR-
Touch your finger repeatedly to a green ground connection point or unpainted metal
in the appliance.
Before removing the part from its package, touch the anti-static bag to a green ground
connection point or unpainted metal in the appliance.
Avoid touching electronic parts or terminal contacts; handle electronic control assembly
by edges only.
When repackaging main control assembly in anti-static bag, observe above instructions.
Voltage Measurement Safety Information
When performing live voltage measurements, you must do the following:
Verify the controls are in the off position so that the appliance does not start when energized.
Allow enough space to perform the voltage measurements without obstructions.
Keep other people a safe distance away from the appliance to prevent potential injury.
Always use the proper testing equipment.
After voltage measurements, always disconnect power before servicing.
PAGE 2
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
WHIRLPOOL CONTROL PANEL (features and appearances may vary between models)
Rotating the cycle selector knob turns off each
corresponding cycle indicator. (Features and
appearances vary between models).
“POWER” button: press once
to turn off indicator.
“START/PAUSE” button:
press once to turn off indicator.
Begin or continue test.
“Static Reduce” button:
press once to turn off indicator
(not available on all models).
“EcoBoost” button: press once
to turn off indicator
(not available on all models).
(1st, 2nd, 3rd) Recommended buttons
to access Diagnostic Mode.
Figure 1 - UI Component Test
Color LCD Screen – pressing the buttons around the screen
changes their on-screen representations from black to
green. UI Component Test, Error Codes, Diagnostics, and
System Information are accessed via Service Menus.
“Back & ( )” buttons: press one or more
times to exit Diagnostic Mode.
1st
2nd
3rd
t
PAGE 3
FOR SERVICE TECHNICIAN’S USE ONLY
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DIAGNOSTIC GUIDE
Before servicing, check the following:
Make sure there is power at the wall outlet.
Has a household fuse blown or circuit breaker
tripped? Was a regular fuse used? Inform
customer that a time-delay fuse is required.
Is dryer vent properly installed and clear
of lint or obstructions?
All tests/checks should be made with a
VOM (volt-ohm-milliammeter) or DVM
(digital-voltmeter) having a sensitivity of
20,000 Ω per volt DC or greater.
Resistance checks must be made with
dryer unplugged or power disconnected.
IMPORTANT: Avoid using large
diameter probes when checking harness
connectors as the probes may damage
the connectors upon insertion.
Check all harnesses and connections before
replacing components. Look for connectors
not fully seated, broken or loose wires and
terminals, pin insertion, or wires not pressed into
connectors far enough to engage metal barbs.
A potential cause of a control not
functioning is corrosion or contamination on
connections. Use an ohmmeter to check for
continuity across suspected connections.
SERVICE DIAGNOSTICS
These tests allow factory or service personnel
to test and verify all inputs to the machine control
electronics. You may want to do a quick and
overall checkup of the dryer with these tests
before going to specific troubleshooting tests.
EXITING SERVICE DIAGNOSTICS
Use either of the two methods below to exit
Service Diagnostics.
• Select “Exit Diagnostics” on the
Diagnostics Home Screen.
• Press the “Back” button one or more times,
depending on location in Service Diagnostics.
DIAGNOSTICS HOME SCREEN
LCD Navigation (See figure 2)
ACTIVATING SERVICE DIAGNOSTICS
1. Be sure the dryer is in standby mode
(plugged in with all indicators off).
2. Select any three buttons (except POWER)
and follow the steps below, using the same
buttons. Remember the buttons and the order
that the buttons were pressed. (Recommended
button selections shown in figure 1):
Within 8 seconds,
• Press and Release the 1st selected button,
• Press and Release the 2nd selected button,
• Press and Release the 3rd selected button;
• Repeat this 3 button sequence 2 more times.
3. If the key sequence was entered successfully,
the language selection screen is displayed.
4. Select the desired language—choices are:
English, French, and Spanish.
5. The following screen warns that this area is
for service technicians only.
• Pressing “Exit” returns to original screen.
• Pressing “Enter” continues to DIAGNOSTIC
HOME screen.
NOTE: Service Diagnostics will time out and
return to standby after 5 minutes of user inactivity.
Figure 2 - LCD Navigation
The menu is displayed as a list of
selectable items on separate rows.
Each menu item may contain several
lines.
As user navigates over elements with
additional information, the highlight
extends the length of the screen. All
non-selectable items will display a
short gray highlight preceding the
item.
Pressing the Left or Back button
returns user to previous screen.
The last item after System Info is
“Exit Diagnostics”.
When an invalid item is selected, an
invalid key-press beep is generated.
Pressing the corresponding buttons
for the arrows moves highlight up and
down. Pressing the corresponding
button for OK selects the highlighted
option.
The navigation buttons have press and
hold functionality. If the button is held
for longer than 1 second, the navigation
will automatically move one row
every 0.5 seconds.
These buttons are used for navigation and selection.
PAGE 4
FOR SERVICE TECHNICIAN’S USE ONLY
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DIAGNOSTICS HOME SCREEN
The “Diagnostics Home” screen (see figure
2, page 3) displays the following service
diagnostic items:
• Error Diagnostic – Access Error Codes,
Error History, Quick Diagnostic Test, and
Clear All Errors
• Component Activation – Activation and
functional testing of system components
and sensors (page 5)
• System Info – Displays model #, serial
#, hardware info, and other system
variables (page 5)
• Exit Diagnostics – Exits Service
Diagnostics and returns to standby mode
ERROR DIAGNOSTIC
Access Error Codes, Error History,
Quick Diagnostics, and Clear All Errors
NOTE: If no saved error exists, the only menu
item displayed is “Quick Diagnosic Test”.
• Error Codes – Displays most recent saved
fault/error code (if no saved error exists,
this item is NOT shown). Refer to Fault/
Error Code chart on page 7.
Figure 3 - Error Diagnostic Screen
• Error History – Displays the last four
saved fault/error codes (if no saved error
exists, this item is NOT shown). Provides
error code and description, time of error,
and cycle information when error occurred
(see figure 4).
• Quick Diagnostic Test – Performs a quick
system level test of the dryer and displays
error results in a dialog box (see figure 5).
Tests drum motor and heater(s), exhaust
and inlet thermistors, air flow (AF), and
low line voltage (L2). Test stops on first
error detected. Use this test to check for
errors and verify repairs. NOTE: Door
must be closed to perform test.
• Clear All Errors – Clears all stored fault/
error codes (if no saved error exists,
this item is NOT shown). NOTE: Once
the errors are cleared, they cannot be
recovered again.
Figure 5 - Quick Diagnostic Test
Figure 4 - Error History Screen
PAGE 5
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COMPONENT ACTIVATION
Activation and functional testing of system
components and sensors (see Figure 6).
• Component Activation – When a
component is selected from the
Component Activation menu (see Figure
6), a screen appears providing component
information, and if available, attributes
related to the component (see figure
7). Many of the components listed can
be turned on and off. By default, the
component is off. (See chart on page 6.)
Figure 6 - Component Activation Menu
Figure 7 - Component Screen
• UI Component Test – Upon activation,
all LEDs are turned on. Pressing each
button turns off its LED, rotating the cycle
selector knob turns off each LED, and
pressing the ATM buttons changes their
on-screen representations from black to
green (see figure 8). Press and hold the
right-most navigation key to return to
previous screen.
If indicators do not turn off and beep after
pressing buttons and rotating the cycle
selector, go to TEST #6: Buttons
& Indicators, page 19.
SYSTEM INFO
Displays model and serial number, hardware
information, and other system variables (if
provided).
NOTE: Missing system information does not
indicate a problem. The system information
screens are common across various
platforms; therefore, information provided on
one dryer may not be available on another. If
uncertain about the information, check with
technical support.
NOTE: All non-selectable items will display a
short gray highlight preceding the selection;
however, as the highlight of the screen moves
over items with more information, it displays
regular background length. (see Figures 9 & 10.)
Non-selectable items
Items with more info.
Figure 9 - System Information Screen Figure 10 - Hardware Information Details
Figure 8 - UI Component Test
PAGE 6
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Component Activation Chart
Output On/Off Details
UI Component Test N/AUpon activation, all LEDs are turned on. Pressing each button turns off
its LED. Rotating the cycle selector knob turns off each LED. Pressing
the ATM buttons changes their on-screen representations from black
to green.
Motor YES Status (On/Off) NOTE: Door must be closed.
If the motor does not turn on, go to TEST #3, page 12.
Heater1 (Electric)/ Heat On (Gas) YES Status (On/Off) NOTE: Door must be closed.
Attributes: Exhaust & Inlet Thermistor Reading.
When you turn on heat, the motor is turned on as well. If temp is
too high, system will automatically turn off heat.
• If the motor does not turn on, go to TEST #3, page 12.
• If no heat is detected, go to TEST #4, page 13.
Heater2 (Electric Only) YES Status (On/Off) NOTE: Door must be closed.
Attributes: Exhaust & Inlet Thermistor Reading.
When you turn on heat, the motor is turned on as well. If temp is
too high, system will automatically turn off heat.
• If the motor does not turn on, go to TEST #3, page 12.
• If no heat is detected, go to TEST #4, page 13.
Heater 1 & 2 (Electric Only) YES Status (On/Off) NOTE: Door must be closed.
Attributes: Exhaust & Inlet Thermistor Reading.
When you turn on heat, the motor is turned on as well. If temp is
too high, system will automatically turn off heat.
• If the motor does not turn on, go to TEST #3, page 12.
• If no heat is detected, go to TEST #4, page 13.
Inlet ThermistorN/A Status (F°, C°, and Resistance)
If inlet thermistor reading is out of range, go to TEST #4a, page 16.
Exhaust ThermistorN/A Status (F°, C°, and Resistance)
If exhaust thermistor reading is out of range, go to TEST #4a, page 16.
Moisture Sensor N/AStatus (Open/Closed)
• Place finger over both sensor strips. If sensor status does not change,
go to TEST #5, page 18.
Door Status N/AStatus (Open/Closed)
• If opening the door does not change status, go to TEST #7, page 20.
CCU Line Voltage 1N/A Status (L1 Voltage Measurement) NOTE: Door must be closed.
When measuring L1, the motor and heater are activated.
• If L1 is absent, go to TEST #1, page 9.
CCU Line Voltage 2 (Electric Only)N/A Status (L2 Voltage Measurement) NOTE: Door must be closed.
When measuring L2, the motor and heater are activated.
• If L2 is absent, go to TEST #1, page 9.
Air Flow N/AStatus (Normal/Restricted) NOTE: Door must be closed.
• If air flow does not turn on, go to TEST #4, page 13.
Drum Light YES Status (On/Off)
• If drum light does not turn on, go to TEST #1, page 9.
Buzzer YES Status (On/Off)
• If buzzer does not sound, go to TEST #6, page 19.
Myst Valve YES Status (On/Off) After being turned on, the myst valve automatically
deactivates after 30 seconds if not turned off.
• If myst valve does not turn on, go to TEST #9, page 21.
COMPONENT ACTIVATION CHART
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FOR SERVICE TECHNICIAN’S USE ONLY
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Fault/Error Code Chart
The fault codes below may be indicated under various conditions and can be accessed through Service Diagnostic Mode.
CODE DESCRIPTION EXPLANATION AND RECOMMENDED PROCEDURE
Indicates that a power failure occurred while the dryer was running. Press START to continue the
cycle, or press POWER to clear the display.
Indicates low air flow that may affect dryer performance.
Confirm that airflow system is not blocked. Check lint screen, exhaust duct, exhaust fan.
• Refer to Fault/Error Code “F4E3” below for recommended procedure.
Indicates low L2 voltage (less than 30 V) is detected at the CCU.
• Refer to Fault/Error Code “F4E4” below for recommended procedure.
F1E1 Cycle Control Unit (CCU) Problem
Indicates a CCU problem.
• Verify all connections to and from the CCU.
• See TEST #1: CCU Power Check, page 9.
F2E1 User Interface (UI) Problem (stuck button)
Indicates a stuck button (depressed for over 20 seconds) or UI mismatch. This fault code
will ONLY appear in the service diagnostic mode. See TEST #6: Buttons and Indicators, page 19.
F2E2 User Interface Software Error 1
Appears if UI cannot read EEPROM software from UI.
• Verify all connections between CCU and UI.
• Replace the UI.
F2E3 User Interface Software Error 2
Appears if main control EEPROM is not programmed correctly.
• Replace the UI.
F3E1
Exhaust Thermistor Open
See TEST #4a: Thermistors, page 16.
Indicates that the exhaust thermistor is open. Temperature drops below 18° F (> 50k ohms).
F3E2
Exhaust Thermistor Shorted
Indicates that the exhaust thermistor has shorted. Temperature above 250° F (< 500 ohms).
See TEST #4a: Thermistors, page 16.
F3E3
Inlet Thermistor Open
Indicates that the Inlet Thermistor is open. Temperature drops below 18° F (>245k ohms).
See TEST #4a: Thermistors, page 16.
F3E4
Inlet Thermistor Shorted
Indicates that the Inlet Thermistor is shorted. Temperature above 391° F (< 328 ohms).
See TEST #4a: Thermistors, page 16.
F3E5
Inlet and Exhaust Thermistor Open
Indicates that the Inlet and Exhaust Thermistor are open. Will occur if the P14 connector is not
plugged into the CCU.
F3E6 Moisture Sensor Open
Indicates that the moisture sensor strip is open. This fault code will ONLY appear in the service
diagnostic mode. See TEST #5: Moisture Sensor, page 18.
F3E7 Moisture Sensor Shorted
Indicates that the moisture sensor strip has shorted. This fault code will ONLY appear in the service
diagnostic mode. See TEST #5: Moisture Sensor, page 18.
F4E1 Heater Relay or Connector Problem
Indicates no voltage detected at the heater relay. This fault code will ONLY appear in the service
diagnostic mode.
• Unplug dryer or disconnect power and check that the wires are plugged into the heater element(s)
F4E3 Restricted Air Flow
Indicates low air flow that may affect dryer performance.
• Confirm that airflow system is not blocked, check lint screen, exhaust duct, exhaust fan.
• See TEST #4a: Thermistors, page 16.
F4E4
L2 Line Voltage Error
L2 indicates low L2 voltage (less than 30 V) is detected at the CCU.
• Check to see if a household fuse has blown or a circuit breaker has tripped.
• Confirm the power cord is properly installed and plugged into the power outlet.
• Check the relay connections on the CCU.
• Gas Models Only: Check the P14 connection on the CCU. (Harness Loopback on pins 4 & 5)
F6E1
F6E2
Communication Error UI to CCU
Communication Error CCU to UI
Communication between the CCU and UI has not been detected.
• Check the harnres continuity and connections between the CCU and UI.
• Check AC and DC supplies. See TEST #1: CCU Power Check, page 9.
• Replace the User Interface.
• Replace the CCU.
SERVICE FAULT/ERROR CODES
CUSTOMER FAULT/ERROR CODES
Power Failure / Interruption
Restricted Air Flow
Low Line Voltage
and the relay(s) on the CCU.
PAGE 8
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
TROUBLESHOOTING GUIDE
Some tests will require accessing components (see page 27).
PROBLEMPOSSIBLE CAUSE CHECKS & TESTS
No power to dryer. Check power at outlet, check circuit breaker,
fuses, or junction box connections.
Connection problem between AC plug and dryer.See Test #2: Supply Connections, page 10.
Connection problem between CCU and UI.Check connections and continuity between
CCU and UI.
Power supplies not present at machine electronics. See Test #1: CCU Power Check, page 9.
User Interface problem. See Test #6: Buttons & Indicators, page 19.
Door not fully closed or striking the door latch.Be sure the door is completely closed,
then press and hold the START button.
Door Switch problem. See Test #7: Door Switch, page 20.
Drive Belt / Belt Switch problem. See Test #3: Motor Circuit, page 12.
Thermal Fuse / Motor problem. See Test #3: Motor Circuit, page 12.
User Interface problem. See Test #6: Buttons & Indicators, page 19.
CCU problem. See Test #1: CCU Power Check, page 9.
Poor airflow.Check lint screen and exhaust vent. Clean
if necessary.
Check the Pause/Cancel button. Perform UI Component Test under
Component Activation.
Moisture Sensor problem. See Test #5: Moisture Sensor, page 18.
Thermistor problem. See Test #4a: Thermistors, page 16.
User Interface problem. See Test #6: Buttons & Indicators, page 19.
CCU problem. See Test #1: CCU Power Check, page 9.
User selects invalid option. Refer customer to “Use and Care Guide”.
User Interface problem. See Test #6: Buttons & Indicators, page 19.
Drive Belt / Belt Switch problem. See Test #3: Motor Circuit, page 12.
Thermal Fuse (elect. Only). See Test #4b: Thermal Fuse, page 17.
Door switch problem. See Test #7: Door Switch, page 20.
Motor problem. See Test #3: Motor Circuit, page 12.
CCU problem. See Test #1: CCU Power Check, page 9.
Check installation. Verify proper dryer installation.
Check for L1 and L2. Perform CCU, L1, and L2 tests in Service
Diagnostics.
Heater system malfunction or open heater coil. See Test #4: Heat System, page 13.
CCU problem. See Test #1: CCU Power Check, page 9.
Heater coil shorted. See Test #4: Heat System, page 13.
Heater relay shorted. See Test #4: Heat System, page 13.
Heater system problem. See Test #4: Heat System, page 13.
Dryness setting for auto cycles.Increase drying times for one or more
Lint screen full. Clean if necessary. Refer customer
to “Use and Care Guide”.
Heater vent clogged. Clean if necessary. Refer customer
to “Use and Care Guide”.
Moisture Sensor problem. See Test #5: Moisture Sensor, page 18.
Adjust Customer Focused Dryness Level. See Test #5a: Adjusting Customer-
Focused Dryness Level, page 19.
Steam cycle not selected. Refer customer to “Use and Care Guide”.
No water to valve. Verify water supply is turned on.
No water from valve. See Test #9: Myst Valve, page 21.
WATER VALVE NOT DISPENSING
(
Water valve is activated intermittently
during the steam cycle.)
WILL NOT HEAT
HEATS IN AIR CYCLE
SHUTS OFF BEFORE CLOTHES
ARE DRY
DRUM WILL NOT SPIN
CONSOLE WON’T ACCEPT
SELECTIONS
WILL NOT POWER UP
- No operation
- No keypad response
- No LEDs or display
WILL NOT START CYCLE
(No response when Start button
is pressed.)
WILL NOT SHUT OFF
WHEN EXPECTED
auto cycles.
PAGE 9
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
TROUBLESHOOTING TESTS
IMPORTANT: The following procedures
may require the use of needle probes
to measure voltage. Failure to use needle
probes will damage the connectors.
TEST #1: CCU Power Check
This test is used to determine if power is
present at the machine control electronics.
This test assumes that proper voltage is
present at the outlet.
1. Unplug dryer or disconnect power.
2. Check for appropriate line voltages at the
outlet: 240VAC (electric 2-phase), 208VAC
(electric 3-phase), or 120VAC (gas).
If line voltage is present, go to step 3.
If line voltage is not present, check for
tripped circuit breaker or blown household
fuse. If CB (circuit breaker) is not tripped,
have customer check with qualified
electrician.
3. Remove top panel to access the machine
electronics.
4. Plug in dryer or reconnect power.
5. CCU VAC – With voltmeter set to AC,
connect black probe to CCU P8-3 (N) and
red probe to P9-2 (L1). (See Figure 11.)
If 120VAC is present, go to step 6.
If 120VAC is not present, perform TEST
#2: Supply Connections, page 10.
6. CCU +5VDC – With voltmeter set to DC,
connect black probe to CCU P2-3 (ground)
and red probe to P2-1 (+5V DC).
If +5VDC is present, go to step 9.
If +5VDC is not present, go to step 7.
7. Unplug dryer or disconnect power. Unplug
P14 from the CCU. Plug in dryer or reconnect
power and repeat step 6.
If +5VDC returns, one of the thermistors
has shorted. To diagnose thermistors,
see TEST #4a, page 16.
If +5VDC is not present, go to step 8.
8. Unplug dryer or disconnect power.
Reconnect P14 to the CCU and unplug P2 from
the CCU. Plug in dryer or reconnect power and
repeat step 6. Perform voltage check inside
header P2 on CCU, between pins 1 & 3—DO
NOT SHORT PINS TOGETHER.
Figure 11 - CCU Connectors & Pinouts
P2 – WIDE TO UI (+5 VDC)
P2-1 BLK +5VDC
P2-2 BLU DATA
P2-3 YEL 5V GND
P8 – MYST VALVE/DOOR SWITCH
P8-5 OPEN
P8-4 TAN DOOR SWITCH
P8-3 WHT NEUTRAL
P8-2 G/Y CHASSIS GND
P8-1 RED MYST VALVE
P5 – +12VDC
P5-1
P5-2
P5-3 12V GND
P5-4
P5-5
P5-6
P5-7
P5-8 +12VDC
P9 – MOTOR/L1
P9-2 BLK L1
P9-1 LT BLU MOTOR
P13 – MOISTURE SENSOR
P13-2 RED MOISTURE SENSOR
P13-1 BLK MOISTURE SENSOR
P14 – THERMISTORS
P14-6 RED OUTLET THERMISTOR
P14-5 RED MODEL RTN (GAS MODEL)
P14-4 RED MODEL (GAS MODEL)
P14-3 RED OUTLET THERMISTOR
P14-2 RED INLET THERMISTOR
P14-1 RED INLET THERMISTOR
P13
P5
P2
P9
P14
P8
K3
K2
K1
Heater Relay #1
(Gas & Elect.)
L1 – BLK
Heater (E) – VLT
Heater (G) – RED
Heater Relay #2
(Elect. Only)
L1 – BLK
Heater – VLT
Motor Relay
•
= pin-1
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When this is found, go to step 5.
If neither of the plug terminals have
continuity with the left-most contact of the
terminal block, replace the power cord and
retest dryer.
5. Access the machine electronics without
disconnecting any wiring to the CCU (See
Dryer Disassembly Instructions, page 23).
6. With an ohmmeter, check for continuity
between the L1 terminal of the plug (found
in step 4) and P9-2 (black wire) on the CCU.
If there is continuity, go to step 7.
If there is no continuity, check that wires to
the terminal block are mechanically secure.
If so, replace the main wire harness in the
dryer and retest.
7. With an ohmmeter, check for continuity
between the neutral (N) terminal of the plug
and P8-3 (white wire) on the CCU.
If there is continuity, go to step 8.
If there is no continuity, and the mechanical
connections of the wire are secure, replace
the main wire harness in the dryer and
retest.
8. Visually check that ALL connectors are
fully inserted into the CCU.
9. Reassemble all parts and panels.
10. Plug in dryer or reconnect power.
11. Perform the “Quick Diagnostic Test”
through Service Diagnostics to verify repair.
ELECTRIC DRYER (Canadian Installations):
1. Unplug dryer or disconnect power.
2. Remove the cover plate from the top right
corner of the back of the dryer. See figure 12.
COM
N
L1
Figure 13a - Plug-to-terminal connections
for electric dryer.
Power Cord
Plug
Terminal Block
Figure 12 - Remove the cover plate.
Cover Plate
Remove Screw
If +5VDC is still missing, replace the CCU.
If +5VDC returns, check harnesses and
connections between the CCU and user
interface (UI). If acceptable, replace the UI.
9. CCU +12VDC – with voltmeter set to DC,
connect black probe to CCU P5-3 (ground)
and red probe to P5-8 (+12VDC).
If +12VDC is present, go to step 10.
If +12VDC is not present, replace the CCU.
NOTE: 12V is used to actuate the 120VAC
relays, triacs, and switches.
10. Unplug dryer or disconnect power.
11. Reassemble all parts and panels.
12. Perform the “Quick Diagnostic Test”
through Service Diagnostics to verify repair.
TEST #2: Supply Connections
This test assumes that proper voltage is
present at the outlet, and for U.S. installations,
a visual inspection indicates that the power
cord is securely fastened to the terminal block
(electric dryer) or wire harness connection
(gas dryer).
ELECTRIC DRYER (U.S. Installations):
1. Unplug dryer or disconnect power.
2. Remove the cover plate from the top right
corner of the back of the dryer. See figure 12.
3. With an ohmmeter, check for continuity
between the neutral (N) terminal of the plug
and the center contact on the terminal block.
See figure 13a.
If there is no continuity, replace the power
cord and test the dryer.
If there is continuity, go to step 4.
4. In a similar way, check which terminal of
the plug is connected to the left-most contact
on the terminal block and make a note of
it. This will be L1 (black wire) in the wiring
diagram. See figure 13a.
PAGE 11
FOR SERVICE TECHNICIAN’S USE ONLY
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3. Access the machine electronics
without disconnecting any wiring (see Dryer
Disassembly Instructions, page 23).
4. With an ohmmeter, check the continuity
from L1 and N plug terminals of the power
cord to the terminals for L1 and N on the
CCU. See figure 13b.
If continuity exists for both connections,
go to step 6.
If an open circuit is found, check the integrity
of the connections of the power cord to the
harness in the dryer; harness to the CCU;
and the integrity of the power cord itself.
5. If it is necessary to replace the power
cord, remove the retaining clip that secures
the cord to the back panel. Disconnect the
cord from the main harness and the ground
wire from the rear panel, then pull out the
power cord.
6. Visually check that ALL connectors are
fully inserted into the CCU.
7. Reassemble all parts and panels.
8. Plug in dryer or reconnect power.
9. Perform the “Quick Diagnostic Test”
through Service Diagnostics to verify repair.
GAS DRYER (U.S. and Canadian Installations):
1. Unplug dryer or disconnect power.
2. Remove the cover plate from the top right
corner of the back of the dryer. See figure 12.
3. Check that the power cord is firmly
connected to the dryer’s wire harness.
See figure 14.
P9
1
5
1
P/N XXXXXX Rev X
Date Code YDDD-xx
XXXX-XXX
MADE IN COO
L1
COM
P8
L1
N
Neu
N
Neu
Power Cord
Plug
CCU
Figure 13b - Plug-to-terminal connections
for electric dryer.
4. Access the machine electronics without
disconnecting any wiring (See Dryer
Disassembly Instructions, page 23).
5. With an ohmmeter, check for continuity
between the neutral (N) terminal of the plug and
P8-3 (white wire) on the CCU. The left-hand
side of figure 15 shows the position of the
neutral terminal (N) on the power cord plug.
Also see figure 11, page 9.
If there is continuity, go to step 6.
If there is no continuity, disconnect the
white wire of the main harness from the
power cord at the location illustrated in
figure 14. Test the continuity of the power
cord neutral wire as illustrated in figure 15.
If an open circuit is found, replace the
power cord. Otherwise, go to step 6.
6. In a similar way, with an ohmmeter, check
for continuity between the L1 terminal of the
plug and P9-2 (black wire) on the CCU.
If there is continuity, go to step 8.
If there is no continuity, check the continuity
of the power cord in a similar way to that
illustrated in figure 15, but for power cord’s
L1 wire.
If an open circuit is found, replace the power
cord. Otherwise, replace the main harness.
COM
Neu
G
L1
L1
Masse
N
Neu
N
G
Masse
Figure 14 - Power cord-to-wire harness
connection for gas dryer.
Figure 15 - Power cord terminals, gas dryer.
Power Cord
Plug
Power
Cord
Wire
Harness
PAGE 12
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
7. If the power cord passes the continuity
check, replace the main harness.
8. Visually check that ALL connectors
are fully inserted into their circuit boards.
9. Reassemble all parts and panels.
10. Plug in dryer or reconnect power.
11. Perform the “Quick Diagnostic Test”
through Service Diagnostics to verify repair.
TEST #3: Motor Circuit
3 Quick Check: Motor activation and related
attributes are provided in “Service Diagnostics
➔ Component Activation ➔ Motor”.
This test will check the wiring to the motor
and the motor itself. The following items are
part of this motor system:
NOTE: Refer to strip circuit on page 22
to diagnose drive motor.
1. Unplug dryer or disconnect power.
2. Remove top panel to access the machine
electronics.
3. Check for loose, worn, or damaged drum
belt—repair as necessary.
4. Door Switch problems can be uncovered
by following procedure under TEST #7: Door
Switch, page 20; however, if this was not
done, the following can be performed without
applying power to the dryer. Connect an
ohmmeter across CCU P8-3 (neutral, white
wire) and P8-4 (door, tan wire).
With the door properly closed, the ohmmeter
should indicate a closed circuit (0–2 Ω).
If not, check harnesses and connections
between CCU and door switch. If good,
replace the door switch assembly.
5. Motor Circuit Check - Access the CCU and
measure the resistance across P8-4 and P9-1.
If resistance across P8-4 and P9-1 is in
the range of 1 to 6 Ω, the motor circuit is
acceptable. Replace the CCU.
Otherwise, continue to step 6.
6. Check the wiring and components in the path
between these measurement points by referring
to the appropriate wiring diagram (gas or electric)
on pages 25 or 26. NOTE: To access motor
system components, refer to Dryer Disassembly
Instructions, page 23.
ELECTRIC DRYER ONLY: Check the thermal fuse.
See TEST #4b: Thermal Fuse, page 17.
ALL DRYERS: Continue with step 7 below to test
the remaining components in the motor circuit.
7. Check the drive motor and belt switch.
Slowly remove the drum belt from the spring-
loaded belt switch pulley, gently letting the belt
switch pulley down. See figure 16.
8. Remove the white connector from the drive
motor switch. See figure 17.
Part of Motor System
Electric
Dryer
Gas
Dryer
Drum belt
Door switch
Harness/connection
Thermal fuse
no
Drive motor
Belt switch
Centrifugal switch
Machine control electronics
Figure 16 - Slowly remove drum belt.
Drum
Belt
Belt Switch Pulley
1
5
3
4
6
2
Figure 17 - Remove white connector.
White
Connector
Drive Motor
Switch
PAGE 13
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
9. Remove the bare copper wire terminal from
pin 5 of black drive motor switch. See figure 18.
10. Using figure 18 and the strip circuit on
page 22, check for the resistance values of
the motor’s Main and Start winding coils as
shown in the following table.
NOTE: Main and Start winding coils must be
checked at the motor.
If the resistance at the motor is correct,
there is an open circuit between the motor
and CCU. Go to step 11 to check for belt
switch problem.
If the Start winding resistance is much
greater than 3 ohms, replace the motor.
1
5
3
4
6
2
Main Winding:
Lt. Blue Wire in Back
and Bare Copper Wire
Start
Winding:
Lt. Blue Wire
in Back and
Bare Copper
Wire
Figure 18 - Main and start winding measure points.
Winding
Resistance
in ohms
Contact Points
of Measurement
MAIN3.3–3.6
Lt. blue wire in back at pin 4
and bare copper wire terminal
removed from pin 5 of black
drive motor switch
START2.7–3.0
Lt. blue wire in back at pin 4
and bare copper wire terminal
on pin 3 of black drive
motor switch
1
5
3
4
6
2
Belt Switch Pulley
Belt Switch
Lt. Blue
Wires
11. Check the belt switch by measuring
resistance between the two light blue wires,
as shown in figure 19, while pushing up the
belt switch pulley.
If the resistance reading goes from open
to a few ohms as pulley arm closes the
switch, belt switch is good. If not, replace
the belt switch.
If belt switch is good and there is still an
open circuit, check and repair the main
wiring harness.
12. Reassemble all parts and panels.
13. Plug in dryer or reconnect power.
14. Perform the “Quick Diagnostic Test”
through Service Diagnostics to verify repair.
TEST #4: Heat System
3 Quick Check: Heater activation and
related component attributes are provided
in “Service Diagnostics ➔ Component
Activation ➔ Heater 1, Heater 2, and
Heater 1+2” for electric, or “Heat On”
for gas.
This test is performed when either of the
following situations occurs:
3Dryer does not heat
3Heat will not shut off
Figure 19 - Checking the belt switch.
PAGE 14
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
This test checks the components making up
the heating circuit. The following items are
part of this system:
NOTE: On the gas dryer, the inlet thermistor
is located below the CCU bracket at the drum
inlet vent. Refer to strip circuit on page 22 to
diagnose heater system.
Dryer does not heat:
Locate the components using figures 20a and
20b. To access heater system components, see
Dryer Disassembly Instructions, page 23.
ELECTRIC DRYER ONLY:
3Quick Check: Perform the “CCU Line
Voltage 1” check under Component
Activation. If L1 is present, the thermal
cutoff is functional.
3Quick Check: Perform the “CCU Line
Voltage 2” check under Component
Activation. If L2 is present, the centrifugal
switch, high limit thermostat, and the side
of the heater connected to heater relay 1
are functional.
1. Unplug dryer or disconnect power.
2. Remove top panel to access the machine
electronics.
3. Check Heaters—on the CCU, use an
ohmmeter to measure the resistance between
the violet wire terminal on heater relay #1
and the violet wire terminal on heater relay #2.
If the resistance is ≤ 50 Ω, go to step 5.
If an open circuit is detected, go to step 4.
Figure 20b - Thermal components,
gas dryer, viewed from front.
Outlet
Thermistor
Thermal Fuse
Gas Dryer
Thermal
Cut-Off
High Limit Thermostat
Flame
Sensor
Figure 20a - Thermal components,
electric dryer, viewed from front.
Inlet Thermistor/High Limit
Thermostat Assembly
Heater
Element
Electric Dryer
Thermal Fuse
Outlet
Thermistor
Thermal
Cut-Off
Part of Heating System
Electric
Dryer
Gas
Dryer
Harness/connection
Heater relay
Thermal cut-off
Thermal fuse no
High limit thermostat
Heat element assembly
no
Gas valve assembly no
Centrifugal switch
Outlet thermistor
Inlet thermistor
Machine control electronics
Console electronics and housing
assembly
Gas supply no
PAGE 15
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
4. Visually check the wire connections between
each relay and their respective heaters. If the
connections look good, check for continuity
across each heater (violet wire to center red
wire). Refer to strip circuit on page 22.
Replace the heater if it is electrically open.
5. Check Thermal Cut-off—on the CCU, use
an ohmmeter to measure continuity between
P9-2 (L1) and the black wire terminal on heater
relay #1. Then, measure continuity between P9-2
(L1) and the black terminal on heater relay #2.
If there is continuity, go to step 7.
If an open circuit is detected, go to step 6.
6. Visually check the wire connections
between each relay (black wire) and the
thermal cut-off. If the connections look good,
check for continuity across the thermal cut-off.
Replace the thermal cut-off if it is
electrically open.
7. Check High Limit Thermostat—visually
check the wire connections from the heaters
and centrifugal switch to the high limit
thermostat. If the connections look good, check
for continuity across the high limit thermostat.
Replace the high limit thermostat if it is
electrically open.
8. If no open circuit is detected, remove P14
from the CCU and measure the outlet thermistor
resistance between P14-3 and P14-6 at the
connector.
If 5–15 k ohms are measured, go to step 9.
If the resistance is less than 1 k ohm,
replace the outlet thermistor.
9. If the preceding steps did not correct the
problem and L1 and L2 were both detected,
replace the CCU. If L2 was not detected,
suspect the centrifugal switch before
replacing the CCU.
10. Reassemble all parts and panels.
11. Plug in dryer or reconnect power.
12. Perform the “Quick DIagnostic Test”
through Service Diagnostics to verify repair.
GAS DRYER ONLY:
1. Verify that the gas supply to the dryer
is turned on.
2. Unplug dryer or disconnect power.
3. Perform TEST #4b: Thermal Fuse on page
17. If the thermal fuse is OK, go to step 4.
4. Perform TEST #4c: Thermal Cut-Off on
page 17. If the thermal cut-off is OK, go to
step 5.
5. Locate the high limit thermostat (see
figures 20a & 20b, page 14). Measure the
continuity through it by connecting the meter
probes to the red and black wire terminals.
If there is an open circuit, replace both the
high limit thermostat and the thermal cut-off.
Otherwise, go to step 6.
6. Perform TEST #4d: Gas Valve on page
17. If the gas valve is OK, go to step 7.
7. If the preceding steps did not correct
the problem, suspect the centrifugal switch
before replacing the CCU.
8. Reassemble all parts and panels.
9. Plug in dryer or reconnect power.
10. Perform the “Quick Diagnostic Test”
through Service Diagnostics to verify repair.
Heat will not shut off:
ALL DRYERS:
1. Unplug dryer or disconnect power.
2. Remove top panel to access the machine
electronics.
3. Remove connector P14 from the CCU and
measure the resistance between P14-3 and
P14-6 at the connector.
If 5–15 k ohms are measured, the outlet
thermistor is OK.
If the resistance is less than 1 k, replace
the thermistor; if open, repair as necessary.
4. Check heater coil(s) for a short to ground
(usually inside the heater box). Repair or
replace if necessary.
5. Plug in dryer or reconnect power.
6. Run an “AIR” only timed dry cycle (no
heat). Check heater relay output(s) on CCU.
With a voltmeter set to AC, measure the
voltage across terminals 1 & 2 for heater
relay #1. If equipped, repeat procedure
with heater relay #2.
If voltage is present (~240VAC for electric,
~120VAC for gas), the relay is open and
working normally.
PAGE 16
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
If little or no voltage is present, the relay
is closed and heater is activated. Replace
the CCU.
7. Unplug dryer or disconnect power.
8. Reassemble all parts and panels.
9. Plug in dryer or reconnect power.
10. Perform the “Quick Diagnostic Test”
through Service Diagnostics to verify repair.
TEST #4a: Thermistors
NOTE: Refer to strip circuit on page 22 to
diagnose outlet and inlet temperature thermistors.
Outlet (Exhaust) Thermistor
The CCU monitors the exhaust temperature
using the outlet thermistor, and cycles the
heater relay on and off to maintain the desired
temperature. NOTE: Begin with an empty dryer
and a clean lint screen.
3Quick Check: Exhaust thermistor readings
in °F, °C, and resistance are provided
in “Service Diagnostics ➔ Component
Activation ➔ Exhaust Thermistor.”
1. Unplug dryer or disconnect power.
2. Remove top panel to access the machine
electronics.
3. Remove connector P14 from the CCU
and measure the resistance between P14-3
and P14-6 at the connector. The following
table gives temperatures and their associated
resistance values.
NOTE: All thermistor resistance measurements
must be made while dryer is unplugged and
connector removed from CCU.
If the resistance is OK, the outlet thermistor
is good. Proceed to step 4.
If the thermistor resistance does not agree
with the table, replace the outlet thermistor.
4. Check P14-3 and P14-6 to dryer cabinet
ground. If either pin indicates continuity
to ground (short), replace wiring harness;
otherwise, proceed to step 5.
TEMP.
°F (°C)
RES.
RANGE
k ohms
TEMP.
°F (°C)
RES.
RANGE
k ohms
50° (10°) 19.0–22.0 80° (27°)8.5–10.5
60° (16°) 14.8–16.8 90° (32°)6.8–8.8
70° (21°)11.5–13.5 100° (38°)5.0–7.0
OUTLET THERMISTOR RESISTANCE
5. If the preceding steps did not correct the
problem, replace the CCU.
Temperature Levels Incorrect – If no error code
is displayed and the connections to the thermistor
are good, check the exhaust temperature value
at any or all of the temperature levels in question,
using the Timed Dry cycle. IMPORTANT: Be
sure EcoBoost (if available) is turned OFF before
testing.
1. Remove load from dryer and disconnect
external vent.
2. Plug in dryer or reconnect power.
3. Run a TIMED DRY cycle of at least 2
minutes in duration. Select High, Medium
High, Medium, Low, or Extra Low. Turn off
EcoBoost.
4. Using a calibrated temperature probe,
take a temperature measurement in the
center of the exhaust outlet. The correct
exhaust temperatures are as follows:
If the temperature is not reached within
~7 minutes, check voltage level and vent
blockage, and then retest.
If the temperature probe does not agree
with temperature setting, replace the outlet
thermistor.
If the temperature probe confirms the
temperature setting, retest at a different
temperature setting.
5. If the preceding steps did not correct the
problem, replace the CCU.
Inlet Thermistor
The CCU monitors the inlet temperature using
the inlet thermistor. The inlet thermistor (along
with the outlet thermistor) is used to detect
air flow, and assists in calculating load size.
NOTE: On the electric dryer, the inlet thermistor
is part of the high thermostat assembly (see
figures 20a & 20b). On the gas dryer, the inlet
thermistor is located below the CCU bracket
at the drum inlet duct (see figure 28, page 27).
TEMPERATURE
SETTING
HEAT TURNS OFF*
°F (°C)
HEAT TURNS ON
°F (°C)
High 155° ± 5° (68° ± 3°)
Medium 140° ± 5° (60° ± 3°)
Low 125° ± 5° (52° ± 3°)
Extra Low 105° ± 5° (41° ± 3°)
EXHAUST TEMPERATURES
10–15° (6–8°)
below the
heat turn off
temperature
Medium High 150° ± 5° (65° ± 3°)
PAGE 17
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
3Quick Check: Inlet thermistor readings in °F,
°C, and resistance are provided in “Service
Diagnostics ➔ Component Activation ➔
Inlet Thermistor.”
1. Unplug dryer or disconnect power.
2. Remove top panel to access the machine
electronics.
3. Remove connector P14 from the CCU and
measure the resistance between P14-1 and
P14-2 at the connector. The following tables
(electric & gas) give temperatures and their
associated resistance values.
NOTE: All thermistor resistance measurements
must be made while dryer is unplugged and
connector removed from CCU.
If the resistance is OK, the inlet thermistor
is good. Proceed to step 4.
If the thermistor resistance does not agree
with the table, replace the inlet thermistor.
4. Check P14-1 and P14-2 to dryer cabinet
ground. If either pin indicates continuity
to ground (short), replace wiring harness;
otherwise, proceed to step 5.
5. If the preceding steps did not correct the
problem, replace the CCU.
TEMP.
°F (°C)
RES.
RANGE
k ohms
TEMP.
°F (°C)
RES.
RANGE
k ohms
68° (20°) 61.2–63.7 131° (55°) 14.5–15.3
77° (25°) 49.0–51.0 140° (60°) 12.1–12.8
86° (30°) 39.5–41.1 149° (65°) 10.2–10.7
95° (35°) 32.0–33.3 158° (70°)8.5–9.0
104° (40°) 26.1–27.2 167° (75°)7.2–7.6
113° (45°) 21.4–22.3 176° (80°)6.1–6.5
122° (50°) 17.6–18.5
ELECT - INLET THERMISTOR RESISTANCE
TEMP.
°F (°C)
RES.
RANGE
k ohms
TEMP.
°F (°C)
RES.
RANGE
k ohms
68° (20°) 57.5–67.6 131° (55°) 14.1–15.6
77° (25°) 46.1–53.8 140° (60°)11.8–12.9
86° (30°) 37.4–43.1 149° (65°)9.9–10.8
95° (35°) 30.4–34.7 158° (70°)8.4–9.0
104° (40°) 24.9–28.2 167° (75°)7.1–7.6
113° (45°) 20.5–23.0 176° (80°)6.0–6.4
122° (50°) 16.9–18.9
GAS - INLET THERMISTOR RESISTANCE
TEST #4b: Thermal Fuse
ELECTRIC DRYER: The thermal fuse is wired
in series with the dryer drive motor.
GAS DRYER: The thermal fuse is wired
in series with the dryer gas valve.
ALL DRYERS:
1. Unplug dryer or disconnect power.
2. Access the thermal fuse by removing
the front panel. See Dryer Disassembly
Instructions, page 23.
3. Using an ohmmeter, check the continuity
across the thermal fuse.
If the ohmmeter indicates an open circuit,
replace the thermal fuse.
TEST #4c: Thermal Cut-Off
If the dryer does not produce heat, check the
status of the thermal cut-off.
1. Unplug dryer or disconnect power.
2. Access the thermal cut-off by removing
the front panel. See Dryer Disassembly
Instructions, page 23.
3. Using an ohmmeter, check the continuity
across the thermal cut-off. See figures 20a
and 20b, page 14, for location.
4. If the ohmmeter indicates an open circuit,
perform the following:
ALL DRYERS: Replace both the thermal
cut-off and high limit thermostat. In addition,
check for blocked or improper exhaust
system, and, on electric dryers, for heat
element malfunction.
TEST #4d: Gas Valve (Gas Dryer)
3Quick Check: Heater activation and related
component attributes are provided in
“Service Diagnostics ➔ Component
Activation ➔ Heat On.”
1. Unplug dryer or disconnect power.
2. Access the gas valve by removing
the back panel. See Dryer Disassembly
Instructions, page 23.
3. Use an ohmmeter to determine if a gas valve
coil has malfunctioned. Remove harness plugs.
Measure resistance across the terminals (see
figure 21, page 18). Readings should match those
shown in the following chart; if not, replace coils.
PAGE 18
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
4. Disconnect the ignitor plug from the
burner. Using an ohmmeter, measure
the resistance across the ignitor’s 2-pin
connector. Resistance should be 50-500 Ω.
If resistance readings are outside the range
or open, replace the ignitor.
If resistance readings are within range, reconnect
the ignitor plug and continue to step 5.
5. Disconnect the wires going to the flame
sensor terminals. Using an ohmmeter, measure
across the two sensor terminals for continuity.
If there is continuity, reconnect the sensor
wires and continue to step 6.
If the reading is open, the flame sensor
needs replacing.
6. Reassemble back panel before
reconnecting power.
7. Plug in dryer or reconnect power.
8. Run a high-temp TIMED DRY cycle
of at least 2 minutes in duration.
9. Watch the ignitor for a couple of minutes
through the “peek window” in the side. If the
ignitor stays red hot and the gas does not come
out and ignite, the flame sensor needs replacing.
NOTE: If ignitor does not come on, line voltage
may not be present at the gas burner. The motor
centrifugal switch may be suspect.
IMPORTANT: To avoid damage to the gas burner
wire harness, ensure the harness is routed
exactly as it was prior to service.
10. Unplug dryer or disconnect power.
11. Reassemble all parts and panels.
12. Plug in dryer or reconnect power.
13. Perform the “Quick Diagnostic Test”
through Service Diagnostics to verify repair.
TEST #5: Moisture Sensor
This test is performed when an automatic cycle
stops too soon, or runs much longer than expected.
NOTE: Dryer will shut down automatically
after 2½ hours.
3Quick Check: Moisture Sensor status
(open/closed) is provided in “Service
Diagnostics ➔ Component Activation ➔
Moisture Sensor.”
The following items are part of this system:
NOTE: Refer to strip circuit on page 22
to diagnose moisture sensor.
1. Activate Service Diagnostics and then
select the Component Activation ➔ Moisture
Sensor. See procedures on page 5.
2. Open the door. Using a wet cloth or one
finger, jointly touch both sensor strips.
If the sensor status changes from open to
closed, the sensor passed the test. Go to
step 9.
If the sensor status remains open, or was
closed before touching both moisture
strips, continue with step 3.
NOTE: Overdrying may be caused by a short
circuit in the sensor system.
3. Unplug dryer or disconnect power.
4. Remove top panel to access the machine
electronics.
5. Access the moisture sensor wires by
removing the console and front panel (see
page 23). Disconnect the 3-wire moisture
sensor connector located below the door
opening between the front panel and bulkhead.
6. Access the CCU and remove connector
P13 from the circuit board. Check the wire
harness for continuity between P13 and the
moisture sensor connector.
If there is continuity, go to step 7.
If there is no continuity, or if a short is
detected, replace the main harness.
Pin 1 – Black
Pin 2 – Blue
Pin 3 – White
Pin 4 – Blue
Pin 5 – White
Figure 21 - Measuring gas valve resistance.
Terminals
Resistance
in ohms
1 to 2 1400 ± 70
1 to 3 570 ± 28.5
4 to 5 1300 ± 65
GAS VALVE RESISTANCE
Part of Moisture System
Electric
Dryer
Gas
Dryer
Harness/connection
Metal sensor strips
Machine control electronics
PAGE 19
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
7. Measure the resistance
across the outermost
contacts of the connector
that includes the two MOVs.
If a small resistance is measured, clean the
two metal moisture strips inside the drum.
If a small resistance is measured after
cleaning, replace sensor harness.
If a small resistance is not measured,
go to step 8.
8. Measure the resistance
across each of the
outermost contacts and
the center terminal (ground
connection).
If a resistance less than infinity is
measured, replace the sensor harness.
9. If the moisture sensor diagnostic test
passes, check the outlet thermistor: TEST #4a,
page 16.
If the problem persists after replacing the
moisture sensor and thermistor, consider
adjusting the dryness level (see TEST #5a:
Adjusting Customer-Focused Dryness Level).
10. If the preceding steps did not correct the
problem, replace the CCU.
a. Unplug dryer or disconnect power.
b. Replace the CCU.
c. Reassemble all parts and panels.
d. Perform the “Quick Diagnostic Test”
through Service Diagnostics to verify repair.
TEST #5a: Adjusting Customer-
Focused Dryness Level
NOTE: If the customer complains about the
clothes being damp and the moisture sensor
passes TEST #5: Moisture Sensor, step 3, the
total dry time can be lengthened by changing
the factory preset dryness setting.
1. Turn the cycle selector knob to an
automatic cycle.
2. From the Automatic Cycle Main Screen,
press and hold the Dryness Level button
(~3 sec.) until the Customer-Focused
Dryness Level screen appears.
3. Select the desired dryness setting: “Factory
Preset” (standard auto cycle), “15% More”,
“30% More”, “15% Less”, or “30% Less”.
The following screen will confirm your selection.
The selection will be stored on the CCU and will
be retained—even after a power loss.
NOTE: If dryness setting is not selected within
6 seconds, it will time out and exit to the Main
Screen.
TEST #6: Buttons and Indicators
This test is performed when any of the
following situations occurs during the “Service
Diagnostics ➔ Component Activation ➔ UI
Component Test.” (See page 5.)
3None of the indicators or display turn on
3Some buttons do not light
3No beep sound is heard
NOTE: The User Interface, which includes the
Console, Modifier, and Center PCBs, must be
diagnosed and replaced as a single component.
None of the indicators or display turn on:
1. Unplug dryer or disconnect power.
2. Remove top panel to access the machine
electronics.
3. Visually check that ALL connectors
are fully inserted into the CCU.
4. Visually check that ALL connectors
are fully inserted into the UI.
5. Visually check that the UI and housing
assembly is properly inserted into the front
console.
6. If all visual checks pass, perform
TEST #1: CCU Power Check, page 9,
to verify supply voltages.
If supply voltages are present, replace
the user interface and housing assembly.
If supply voltages are not present,
replace the CCU.
7. Reassemble all parts and panels.
8. Plug in dryer or reconnect power.
9. Perform the “UI Component Test”
to verify repair.
Some buttons do not light:
1. Unplug dryer or disconnect power.
2. Remove top panel to access the machine
electronics.
PAGE 20
FOR SERVICE TECHNICIAN’S USE ONLY
DO NOT REMOVE OR DESTROY
3. Visually check that the UI and housing
assembly is properly inserted into the front
console.
4. If visual check passes, replace the UI
and housing assembly.
5. Reassemble all parts and panels.
6. Plug in dryer or reconnect power.
7. Perform the “UI Component Test”
to verify repair.
No beep sound is heard:
1. Check volume levels under System
Settings ➔ End of Cycle and Button Sound.
Increase volume if needed.
2. Unplug dryer or disconnect power.
3. Remove top panel to access the machine
electronics.
4. Visually check that ALL connectors
are fully inserted into the CCU.
5. Visually check that ALL connectors
are fully inserted into the UI.
6. If all visual checks pass, replace the
UI and housing assembly.
7. Reassemble all parts and panels.
8. Plug in dryer or reconnect power.
9. Perform the “UI Component Test”
to verify repair.
TEST #7: Door Switch
3Quick Check: Door Switch status (open/
closed) is provided in “Service Diagnostics
➔ Component Activation ➔ Door Status.”
Functionality is verified when the door status
toggles between Open to Closed. If the
preceding condition is not met:
1. Unplug dryer or disconnect power.
2. Remove top panel to access the machine
electronics.
3. Check that the wires between the door
switch and CCU are connected. (Refer to
wiring diagrams on pages 25 and 26.)
If the connections are good, replace the
wire and door switch assembly and retest.
If wire and door switch assembly have
been replaced and dryer still does not start,
replace the CCU.
4. Reassemble all parts and panels.
5. Plug in dryer or reconnect power.
6. Perform the “Quick Check” above
to verify repair.
TEST #8: Drum Light
3Quick Check: Drum Light status (on/off)
is provided in “Service Diagnostics ➔
Component Activation ➔ Drum Light.”
Functionality is verified when the drum light
turns on and off. If the preceding condition
is not met:
1. Press and hold the EcoBoost/Drum Light
button on the console until the LCD screen
acknowledges the drum light is on.
If the LCD does not confirm the button
press, replace the user interface (UI).
If the LCD confirms the button press,
go to step 2.
2. Unplug dryer or disconnect power.
3. Remove the top panel to access CCU
and UI.
4. Verify the drum LED connector P13
is securely connected to the UI.
5. Check harness and inline connections
between the drum LED and UI.
If the harness and connections are good,
go to step 6.
If not, repair or replace as needed.
6. Unplug the drum LED connector P13
from the UI.
7. Plug in dryer or reconnect power.
8. Press and hold the EcoBoost/Drum Light
button on the console to activate the LED
circuit.
9. With a multimeter set to milliamps,
measure the current across UI connector
P13, pins 1 and 3. If the drum LED driver
is working properly, there should be a
measurement of 150–370 mA.
If the current is present, replace the
drum LED.
If the current is not present, replace the UI.
10. Unplug dryer or disconnect power.
11. Reassemble all parts and panels.
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dans d''autres langues
- English: Whirlpool Washer User manual
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