F5
RCA
Control Board Relay or Watchdog Failure
Display shows F5 and oven functions are disabled or intermittent.
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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 relay on electronic oven control, Internal control board fault, Power surge damage, Poor neutral or line connection to control
How to Fix / Troubleshooting
Safety first: Disconnect power at the breaker. Capacitors on the control board can hold charge; avoid touching bare solder joints.
- Power reset: Turn off the breaker for 5–10 minutes, then restore power. If F5 returns immediately, the control board is likely defective.
- Inspect wiring: Remove the rear control panel cover and check all connectors to the electronic oven control for tight fit and signs of overheating or discoloration. Tighten any loose spade terminals.
- Check supply voltage: With a qualified person and proper meter, verify correct 240 V supply to the range and 120 V to the control. Low or unstable voltage can damage the board.
- Replace control: If wiring and supply are correct and F5 persists, replace the electronic oven control board.
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Repair Difficulty
Hard
4/5
Required Part
Electronic Oven Control Board
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