F5
Insignia
Control board relay or watchdog failure
Oven displays F5 and may not start or may shut down mid-cycle.
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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 electronic oven control board, Power surge damage to control, Loose neutral or line connection at control, Internal relay contact failure
How to Fix / Troubleshooting
Safety First: Disconnect power at the breaker. Capacitors on the control board can retain charge; avoid touching bare circuitry.
- Power cycle: Turn off power for 5–10 minutes, then restore. If F5 reappears immediately, suspect the control board.
- Inspect wiring: Remove the rear control panel cover and check all connectors to the electronic oven control board. Ensure L1, L2, and neutral connections are tight and not discolored or burnt.
- Check for burn marks: Look for burnt spots or bulging components on the control board. Any visible damage indicates replacement is required.
- Surge protection: If the error followed a power outage or surge, consider installing a surge protector for the range circuit after repair.
- Replace control: If wiring is sound and F5 persists, replace the electronic oven control board with the Insignia-specified part number for your model.
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Repair Difficulty
Hard
4/5
Required Part
Electronic Oven Control Board
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