F08
Whirlpool Heater or Water Level Related Fault (Heater Relay Stuck or Fill Error)

Washer-dryer combo shows F08 and may not fill correctly or may overfill/underfill.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Stuck heater relay on control board, shorted heating element, incorrect water level feedback, wiring short to heater circuit

How to Fix / Troubleshooting

Safety first: Disconnect power. Water and electricity are both present; use caution.

Step-by-step checks:

  • Inspect heater circuit: As with F07, check the heating element and wiring for shorts to ground. A grounded element can cause control faults.
  • Check water level system: Verify the pressure hose and switch are not blocked or damaged, as incorrect level sensing can interact with heater control.
  • Control board inspection: Look for signs of a welded or burnt heater relay on the main control board. If the heater is energized when it should not be (e.g., during cold fill), the relay may be stuck.

When to replace: Replace any grounded heater or damaged wiring. If the heater circuit is sound but F08 persists, replace the main control board.

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Repair Difficulty

Hard 4/5

Required Part

Main Control Board (CCU)
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