Washer shows F40, will not start cycle

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.

Possible Causes

Incorrect mains frequency, unstable power, internal power supply fault, interference on mains line

How to Fix / Troubleshooting

Safety first: Do not attempt to modify mains supply.

Check power source: Ensure the washer is connected directly to a proper wall outlet, not a generator or inverter with unstable frequency.
Try another outlet: If possible, test the washer on a different circuit.

If F40 persists on stable mains: The internal power/frequency detection circuit on the control board is likely faulty and the board must be replaced.

Repair Difficulty

Professional Required 5/5

Required Part

Main Control Board

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