May 4, 2025

Whirlpool Duet Washer Error Codes – Full Diagnostic & Repair Guide

Is your Whirlpool Duet front-load washer displaying a fault code? Below is a comprehensive guide with all Whirlpool Duet washer error codes, complete descriptions, and step-by-step repair instructions.

FH – No Water Detected or Pressure Switch Trip Not Detected

If after 30 seconds the control does not detect water entering the machine, the valves will turn off and the FH error code will display. Alternatively, if the valves have been on for 8 minutes and the flow meter detects 10.5 gallons of water but the pressure switch hasn’t tripped, the valves will shut off and FH will flash.

To Clear: Press PAUSE/CANCEL twice.

Potential Causes:

No water in unit:
- Ensure both water supply valves are fully open.
- Inspect inlet hoses for kinks or blockages and check screens in inlet valves for clogs.
- Test inlet valve operation.
If water is in the unit:
- Check drain pump functionality.
- Ensure the pressure switch hose is properly connected to the tub and switch, and is in good condition.
Check for siphoning issues.
Inspect wire harness connections to inlet valves, pressure switch, drain pump, flow meter, and central control unit (CCU).
Look for leaks in all hoses.
Test the pressure switch, flow meter, and CCU.

F02 – Long Drain

If the washer takes longer than 8 minutes to drain, the water valves turn off and F02 displays. After 4 minutes, a “Sud” error appears, followed by F02 after another 4 minutes.

To Clear: Press PAUSE/CANCEL twice.

Potential Causes:

Clogged or kinked drain hose.
Check pump electrical connections and verify the pump is running.
Clean the drain pump filter of any debris or foreign objects.
If unresolved, replace the drain pump.

F05 – Water Temperature Sensor Error

Occurs during the wash cycle if the temperature sensor (NTC) is out of range or if the heating element circuit fails.

Potential Causes:

Test the water temperature sensor, heating element, and element relay.
Check all related wire connections.
Replace the faulty component.

F06 – Drive Motor Tachometer Error

The control cannot properly detect motor speed and shuts the machine down. If triggered during a high-speed spin, the door unlocks after 3 minutes.

Potential Causes:

Inspect wire harness connections between drive motor, tachometer, and the Motor Control Unit (MCU).
Check MCU connections to the Central Control Unit (CCU).
Test the drive motor, MCU, and wiring.

F07 – Motor Control Unit Error

Indicates a short in the Motor Control Unit detected by the Central Control Unit. If this occurs during spin, the door unlocks after 3 minutes.

Potential Causes:

Check all wiring between the drive motor, MCU, and CCU.
Test and replace the MCU or drive motor if faulty.

F09 – Overflow Condition

If the overflow contact on the pressure switch remains closed for 60+ seconds, an overflow condition occurs. The door stays locked and the drain pump runs continuously—even if PAUSE/CANCEL is pressed.

To Service: Unplug the washer.

Potential Causes:

Blocked or kinked drain hose.
Loose or damaged wire connections to the drain pump, pressure switch, or CCU.
Foreign objects in the drain pump filter.
Failed drain pump, inlet valve not shutting off properly, or faulty pressure switch.

F10 – MCU Heat Sink Thermal Trip

If the MCU heat sink becomes too hot, its thermal protector opens, stopping motor functions and triggering F10.

Potential Causes:

Ensure proper unit installation—avoid heat sources and ensure ventilation.
Check wiring to the MCU, motor, and CCU.
Inspect for worn parts in the drive system.

F11 – Serial Communication Error

Communication cannot be established between the CCU and MCU.

Potential Causes:

Loose or faulty wire harnesses to MCU, motor, or CCU.
Worn drive system components.
Faulty MCU, CCU, or motor.

F13 – Dispenser Circuit Error

The dispenser motor cannot reach its required position.

Potential Causes:

Check for broken or misaligned mechanical linkage to the dispenser top.
Inspect wiring between dispenser motor and CCU.
Replace the dispenser motor if necessary.

F14 – EEPROM Error

Indicates a data read error from the EEPROM chip on the CCU.

Potential Causes:

A power surge may cause this—unplug the unit for 2 minutes and retry.
If persistent, replace the CCU.

F15 – MCU Error

Multiple resets or system errors within the MCU trigger this error mode.

Potential Causes:

Check wiring between MCU, motor, and CCU.
Inspect drive belt, MCU, and motor for faults.

Sud – Suds Lock (Detergent Overdose Detected)

The MCU detects excessive suds via motor current analysis. Can indicate detergent overdose, heavy load, or drainage issues.

Potential Causes:

If too much detergent was used, run a Rinse/Spin cycle, then a Normal cycle without detergent.
Inspect drain hose and pump for clogs or kinks.
Check pump filter and wire harness connections.
Test drain pump, pressure switch, and CCU.

FdL – Door Lock Error

The door cannot lock after six attempts.

Potential Causes:

Broken or removed door lock mechanism.
Faulty door lock/switch assembly or wire harness to CCU.
Replace failed parts as needed.

FdU – Door Unlock Error

The door cannot unlock after six attempts.

Potential Causes:

Broken door lock mechanism.
Foreign objects in the latch assembly.
Faulty wiring or switch assembly.

Manual Door Unlock Procedure:

Unplug the unit.
Remove the lower toe panel.
Reach up inside the front panel to the door latch assembly.
Pull the tear-drop-shaped tab on the latch downward ~¼ inch until a click is heard.
The door will now open.

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