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Whirlpool Duet GHW Washer Repair Guide

This Whirlpool Duet front loading washing machine repair guide is for washer model numbers GHW9100 and GHW9200. However most of the washing machine troubleshooting and repair tips described in this guide will apply to newer Whirlpool Duet front loading washing machine models.

Duet Washer Repair Guide Menu 
Duet Troubleshooting Guide | Duet Diagnostic Test Mode
Duet Washer Test Overview | Duet Washer Error Codes
Duet Washer Part Testing | Duet Wire Diagram

Repair Guides For Other Duet Washer Styles

 

Direct Drive Duet Washer Repair

Direct Drive Whirlpool Duet Washer Repair Guide 

 

whirlpool duet washer repair 2nd generation

Repair Guide For Duet Washer Models Starting With WFW

duet washing machines repair part access

Whirlpool Duet Washing Machine Troubleshooting Guide

WASHER PROBLEM POSSIBLE CAUSE/TEST
Note:  Possible Cause/Tests MUST be performed in order for each problem.
WASHING MACHINE WON’T POWER UP.  (touch-pads do not respond when pressed) 1. Test the line voltage and for blown fuses.
2. Test for voltage going to Central Control Unit (CCU) by listening for a click in the CCU when unit is plugged in. If no click replace CCU.
3. Unplug the unit before continuing.
4. Test continuity of line cord and line filter.
5. Check harness connections to CCU.
6. Check touch-pad/LED assembly.
WASHING MACHINE WON’T START 1. Open and close the door. The door has to be opened between consecutive wash cycles.
2. Check the door switch/lock unit using the diagnostics.
3. If Door is Locked, Drain the Unit.
4. Check the wire harness connections.
5. Check the touch-pad/LED assembly.
WASHING MACHINE WON’T SHUT OFF 1. Check for a Fault/Error Code on the display.
2. Press PAUSE/CANCEL button on the touch-pad twice.
3. Check the touch-pad/LED assembly
4. Check that the Drain hose and Drain Pump Filter is clear of
foreign objects and not plugged.
5. Check Drain Pump.
6. Check the CCU.
WASHING MACHINE CONTROL WON’T ACCEPT SELECTIONS 1. Press PAUSE/CANCEL button on the touch-pad twice.
2. Drain the unit, then verify that the Drain hose and Drain Pump Filter is clear of foreign objects.
3. Check/ Replace Touch-pad/LED assembly.
4. Check harness connections.
5. Check the CCU.
WASHING MACHINE WON’T DISPENSE 1. Verify the unit is level.
2. Verify Dispenser Drawer is not clogged with detergent.
3. Check water connections to the unit and within the unit.  Check for plugged screen in water source.
4. Check Dispenser motor.
5. Check harness connections.
6. Check CCU.
WASHING MACHINE WON’T FILL 1. Check installation.
2. Check Water valves.
3. Check water connections to the unit and within the unit.  Check for plugged screen in water source.
4. Check Operating Pressure Switch.
5. Check the CCU.
6. Check under problem “WON’T DISPENSE”
WASHING MACHINE OVER FILLS 1. Verify the unit is level.
2. Check pump drain system – this could indicate a failure to drain.
3. Check Operating Pressure Switch.
4. Check Pressure Switch hose.
5. Check Flow Meter operation.
6. Check the CCU.
WASHING MACHINE BASKET WON’T ROTATE 1. Check Drive belt.
2. Check Drive motor.
3. Check Wire Harness connections.
4. Check Motor Control Unit.
WASHING MACHINE MOTOR OVER HEATS 1. Check The Drive motor.
2. Check Wire Harness connections.
3. Check Drive belt.
4. Check Motor Control Unit.
WASHING MACHINE WON’T DRAIN 1. Check Wire Harness connections.
2. Check Drain pump.
3. Check Drain pump motor.
4. Check that the Drain hose and Drain Pump Filter is clear of foreign objects.
5. Check the CCU.
WASHING MACHINE VIBRATES 1. Remove Shipping system.
2. Check installation.
3. Check leveling feet.
4. Check leveling feet lock nuts.
5. Check for weak floor.
INCORRECT WATER TEMPERATURE 1. Check that the Inlet Hoses are connected properly.
2. Check the Water Heater and Wire Harness connections to it.
3. Check Water Temperature Sensor for an abnormal condition.
4. Check the CCU.

Whirlpool Duet GHW Front-Load Washing Machine Diagnostic Tests

duet washing machine

The Whirlpool Duet front loading washing machine has a diagnostic test mode that can be used to help troubleshoot your washing machine’s problem. This section of the Duet repair guide shows how to enter the diagnostic mode and understand common error codes for this Whirlpool washing machine!

Whirlpool Duet Washer Diagnostic Test Mode

NOTE: The control must be in the OFF state before pressing the touch-pad sequence to start the test.
1. Close the washer door.
2. Press the Duet Control On button.
3. Select the DRAIN/SPIN cycle.
4. Select NO SPIN by pressing the SPIN SELECT button, as needed.
5. Push Prewash Option button four times within five seconds.
C:00 will show in the display.
NOTE:  If your Duet washer model does not have PREWASH mode as an option, press RINSE/HOLD.
If the starting procedure fails, push PAUSE/CANCEL button.  Then try starting the sequence again.
To advance to the next step of the test procedure, push Prewash Option button two times.

Whirlpool Duet Diagnostic Test Overview

Indication Control Action Actuators to be Checked

C:00

Washer Door is Locked

Washer Door Lock System

C:01

Filling with cold water inlet valve

Duet washer flowmeter, Cold water inlet valve

C:02

Distribution system is set to Prewash position

Dispenser motor,
Dispenser contact

C:03

Fill with hot water inlet valve

Hot water inlet valve

C:04

Duet washer basket rotates clockwise at wash speed

Duet washer Motor, MCU control

C:05

Washer’s heater is switched ON.
Basket rotates clockwise with wash speed. If there is not enough water in the tub, the water inlet valve will be switched ON to fill-in the minimum water quantity.
NOTE:  On GHW9100 Models only the Temperature Sensor will be checked

Duet washer Heater, Temperature Sensor

C:06

Duet drain Pump is ON

Duet washer Drain Pump

C:07

Duet washer basket rotates counterclockwise
from 35 to 90 rpm
within 15 seconds

Duet washer Motor, MCU control

C:08

Basket rotates counterclockwise
with max. speed
Basket speed > 1100 rpm

Duet washer Motor, MCU control

Whirlpool GHW Duet Washer Error Codes

The Whirlpool Duet front loading washing machine has a diagnostic test mode that can be used to help troubleshoot your washing machine’s problem. This section of the Duet repair guide shows possible error codes, what they may mean, and what to do next!

Whirlpool Duet Washing Machine Error Codes

Code

What it Means and What to Do

F/H No water detected entering washing machine or Pressure switch trip not detected. If after 30 seconds the control does not detect water entering the washing machine, then valves will be turned off and the error code will be displayed.
Or If the control has turned the washer’s water valves on and after 8 minutes the flow meter has detected 10.5 gallons of water passing through it, but has not detected the pressure switch trip, the valves will be turned off and the error code will flash.
Press PAUSE/CANCEL twice to clear the display.
Potential Causes
• If there is no water in the unit:
• Make sure that both valves at the water source(s) are turned on all the way.
• Check for plugged or kinked inlet hoses, plugged screens in the inlet valves, leak stop inlet hoses.
• Verify inlet valve operation
• If there is water in the washer:
• Verify Drain pump operation 
• Pressure Switch Hose is in good condition and properly connected to Tub and Pressure switch
• Is there a siphon problem? Is the washer’s drain line inserted to far into the drain?
• Verify wire harness connections to; Fill Valves, Pressure Switch, Drain Pump, Flow Meter, and Central Control Unit (CCU)
• Check all hoses for possible leaks
• Verify pressure switch operation
• Verify flow meter operation
• Verify CCU operation
F/02 Long Drain
If the drain time exceeds 8 minutes, the water valves are turned off and “F/02” is flashed. Press PAUSE/CANCEL twice to clear the display.
NOTE: After 4 minutes the “Sud” error will be displayed, then 4 minutes later the F/02 error code will be displayed.
Potential Causes
• Check the drain hose and make sure it is not plugged or kinked
• Check the electrical connections at the pump and make sure the pump is running.
• Check the washer’s drain pump filter and drain pump for objects
• If the above does not correct the problem replace the pump
F/05 Water Temperature Sensor Error
If during the water heating step in the wash cycle, the water temperature sensor (NTC) value is out of range, or the heating element circuit has failed,  the “F/05” error
code will be displayed.
Potential Causes
• Check the Water Temperature Sensor, Heating Element  and Element Relay 
• Check connections to the Sensor, Heating Element and Relay
F/06 Drive Motor Tachometer Error
The Duet washer control is unable to properly detect motor speed and the machine will shut down.
If a failure occurs during high-speed spin the door will be unlocked after 3 minutes.
Potential Causes
• Check wire harness connections between the washer’s Drive Motor/Tachometer and the Motor Control Unit (MCU), and between the MCU and the Central Control Unit
(CCU)
• Check the washer’s Drive Motor
• Check the MCU
• Check the Wire Harness
F/07 Motor Control Unit Error
The Central Control Unit has detected a short in the motor control unit. If a failure occurs during high-speed spin the door will be unlocked after 3 minutes.
Potential Causes
• Check wire harness connections between the Drive Motor and the Motor Control Unit (MCU), and between the MCU and the Central Control Unit (CCU)
• Check the MCU
• Check the Drive Motor
• Check the Wire Harness
F/09 Overflow Condition
If the Overflow contact on the pressure switch is Closed for more than 60 seconds an Overflow condition will occur. In an Overflow condition,  the Door will remain locked, and the Drain Pump will run constantly, even if  PAUSE/CANCEL is pressed twice and the Display is cleared. Unplug the unit to service.
Potential Causes
• Check the drain hose and make sure it is not plugged or kinked
• Check Wire Harness connections to the Drain Pump, Pressure Switch, and Central Control Unit (CCU)
• Check/ Clean Drain Pump Filter of foreign objects
• Check for Drain Pump Failure
• Check the Water Valve for proper shut off
• Check the Pressure switch for proper operation
F/10 Motor Control Unit (MCU) Heat Sink Thermal Trip
If the thermal protector on the MCU heat sink gets too hot, it will open the thermal protector on the heat sink which will stop motor functions and an “F/10”  will be displayed.
Potential Causes
• Check for Proper Installation, verify the unit is not located near a source of heat and has proper ventilation.
• Check Wire Harness connections to the MCU, the motor, and Central Control
Unit (CCU)
• Check the Drive system for any worn or failed components
• Check MCU
• Check Motor
F/11 Serial Communication Error
Communication between the Central Control Unit (CCU) and the Motor Control Unit
(MCU) cannot be sent correctly.
Potential Causes
• Check Wire Harness connections to the MCU, the motor, and Central Control
Unit (CCU)
• Check the Drive system for any worn or failed components
• Check MCU
• Check CCU 
• Check Motor
• Check Wire Harness
F/13 Dispenser Circuit Error
If the dispenser motor is not able to be driven to it’s proper position.
Potential Causes
• Check mechanical linkage from dispenser motor to the top of the dispenser.
• Check Wire Harness connections to the dispenser motor and Central Control Unit (CCU)
• Check Dispenser Motor
F/14 EEPROM Error
The Central Control Unit (CCU) receives it’s data from an EEPROM onboard the CCU. If there is an error reading this data it will cause this error.
Potential Causes
• A power glitch may cause this error. Try unplugging the Unit for two minutes to see if that fixes the error.
• Check CCU.
F/15 Motor Control Unit (MCU) Error
If the MCU detects multiple resets or errors during a wash cycle it will go into this error mode.
Potential Causes
• Check Wire Harness connections to the MCU, the motor, and Central Control Unit (CCU)
• Check Drive belt
• Check MCU 
• Check Motor
• Check Wire Harness
Sud SUDS LOCK (Overdose of Detergent detected during the Wash Cycle)
The motor control unit senses a suds lock condition by analyzing the current draw on the drive motor.  If “Sud” is displayed a potential suds lock is detected. This may signify a bad pump, an extra heavy load, excessive detergent, or excessive suds.
Potential Causes
• If too much detergent was used, run the unit through a Rinse/ Spin cycle then a normal cycle without adding any detergent. This should clear the unit of the excess detergent.
• Check the drain hose and make sure it is not plugged or kinked
• Check Wire Harness connections to the Drain Pump, Pressure Switch, and Central Control Unit (CCU)
• Check/ Clean Drain Pump Filter of foreign objects
• Check Drain Pump 
• Check the Pressure Switch
• Check CCU
F/dL Door Lock Error
A Door Lock Error occurs if the door cannot be locked. It will try to lock it 6 times before displaying the error.
Potential Causes
• Door Lock Mechanism broken or removed from the Door
• Check Door Lock/Switch Assembly
• Check the wire harness connections to the Door Lock/Switch Assembly and Central Control Unit (CCU)
• Door Lock/Switch Assembly Failure
F/dU Door Unlock Error
A Door Unlock Error occurs if the door cannot be unlocked. It will try to unlock the door 6 times before displaying the error.
Potential Causes
• Door Lock Mechanism broken.
• Check Door Lock/Switch Assembly for foreign objects
• Check Wire Harness connections to the Door Lock/Switch Assembly and Central Control Unit (CCU)
• Door Lock/Switch Assembly Failure

Whirlpool Duet Washing Machine Part Testing

CENTRAL CONTROL UNIT (CCU)

duet washing machines repair test points

NOTE: Connector Test Points Are Numbered 1234567 From Right To Left When The Connector Is Plugged In Looking From Behind

Whirlpool Duet Dispenser Switch and Motor
Switch Test Points 6 & 5 = 0 ohms
Motor Test Points 3 & 1 = 1400 ohms

Whirlpool Duet Door Lock/Unlock Solenoids
Unlock Solenoid = 60 ohms
Lock Solenoid = 60 ohms

Whirlpool Duet Door Lock Main Switches
To check the door lock main switches, the door must be locked.  Begin by selecting a cycle and press START.  You will hear the door lock solenoid engage.  Unplug the washer from the wall outlet and check for continuity at the following points.
Main Switch 1 Test Points 5 & 4 = 0 ohms
Main Switch 2 Test Points 2 & 1 = 0 ohms

Whirlpool Duet Drain Pump Motor
15 ohms

Whirlpool Duet Door Switch
Door Open = 0 ohms
Door Closed = Infinity

Whirlpool Duet Heating Element
Between Terminals or test points 1 & 2 = 15 ohms

Whirlpool Duet Motor Control Unit (MCU)
Motor Connector Test Points 1 & 2 = 6 ohms
Motor Connector Test Points 1 & 3 = 6 ohms
Motor Connector Test Points 2 & 3 = 6 ohms
Motor Connector Test Points 4 & 5 = Tachometer

Whirlpool Duet Temperature Sensor

Temperature Proper Resistance Level
32°F(0°C) 35.9K Ω
86 ° F (30° C) 9.7K Ω
104° F (40° C) 6.6K Ω
122° F (50° C) 4.6K Ω
140° F (60° C) 3.2K Ω
158° F (70° C) 2.3K Ω
203° F (95° C) 1K Ω

(How to use a Voltmeter)

Whirlpool Duet Washer Water Valve Solenoids

Hot Water Valve Solenoid = 800 ohms
Cold Water Valve Solenoid = 800 ohms

Whirlpool Duet Washer Wire Diagram

duet washing machines wire diagram

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