Washer-dryer shows F40, will not start cycle.

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.

Possible Causes

Unstable mains frequency or voltage, incorrect power supply, control board power circuit fault

Safety first: Ensure the appliance is connected directly to a properly grounded wall outlet (no generators or inverters).

Check supply:

Power quality: Avoid using the machine on unstable power sources. Verify voltage and frequency are within local specifications (e.g., 230 V / 50 Hz).

Control board: If supply is correct and F40 persists, the control board's power sensing circuit may be faulty and the board may need replacement.

Hard 4/5

Main Control Board (Power Module)

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