Washer will not start; F40 displayed; line voltage or power-related error.
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
How to Fix / Troubleshooting
Safety first: Turn off the circuit breaker before inspecting power connections. Use a meter only if you are trained to work with live voltage.
Verify supply voltage:
- Confirm the washer is connected to a dedicated 120 VAC circuit (in North America). Avoid extension cords.
- Check the outlet for proper voltage and polarity.
Inspect internal power connections:
- Unplug the washer and remove the top or rear panel.
- Inspect the line filter and main control board power connectors for loose wires or burn marks.
If the supply and wiring are correct but F40 persists, the main control's power supply section may be defective and the board should be replaced.
Repair Difficulty
Required Part
We may earn a commission from links on this page.