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Service Information For Appliance Repair Professionals

Whirlpool Washer F20 Error Code

Model Specific Error Code

WFW3090JW WFW5090JW

ACU Error (Or Heater Error)

F20

The ACU has detected that the main or heater relay has a short or open circuit, or that the heater has an open circuit.

Whirlpool Washer F20 Error Code Error Code Possible Causes

  • Verify that the heater is OK
  • Check the resistance of the heater connections (L1 and N)
  • Check the resistance of the heater (L1 and N)
  • If the heater has reduced resistance of L1 or N, replace the heater and run the Service Test Cycle
  • If the heater has an open circuit, replace the heater and the ACU
  • Check the connections on the heater and ACU and check the wires
  • If the heater and wires are OK, replace the ACU

Model Specific Error Code

All Others

Long Fill Error

F20

The washer is sensing a low flow of water.

Whirlpool Washer F20 Error Code Error Code Possible Causes

  • The water supply is not turned on or has very low pressure.

  • The water hose is plugged.

  • The water valve is defective.

  • The main PCB is defective.

  • Loose wiring connection at the water valve or main PCB.

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This information is provided for educational purposes only. Please consult the appropriate Service Mode or Technical Document for your model. Always take proper safety precautions when installing or repairing any major appliance.