F40
Fisher & Paykel
Power Relay or Triac Drive Fault
F40 displayed, oven will not heat, relays do not click
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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
Failed power relay on control board, Burnt relay contacts, Open circuit between relay and heating elements, Control board logic failure
How to Fix / Troubleshooting
Safety first: This fault involves high-voltage components. Disconnect power and consider professional service if you are not experienced.
- Check supply voltage: Verify that the range is receiving full rated voltage at the terminal block (typically 220–240 V). Low or missing leg can cause relay faults.
- Inspect control board: Remove the control panel and visually inspect the board for burnt or cracked solder joints around the power relays.
- Element continuity: Test bake and broil elements for continuity. An open element can sometimes trigger relay-related errors.
- Board replacement: If elements and wiring are good but relays do not energize and F40 persists, replace the electronic oven control board.
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Repair Difficulty
Professional Required
5/5
Required Part
Electronic Oven Control Board
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