Electrolux Oven Error Code F5 — Watchdog Relay Fault
What this means
The F5 error code on Electrolux ovens indicates the electronic control board's watchdog safety circuit has detected that a relay (bake or broil) is not functioning correctly. The watchdog circuit monitors that relays turn on and off as commanded — if a relay fails to respond or stays on when it shouldn't, the watchdog triggers F5 to prevent an unsafe condition. This is primarily a control board failure.
Alternate codes: F 5, F05
Step-by-step fix
4 stepsReset the oven
Turn off the circuit breaker for 10 minutes, then turn it back on. If F5 was triggered by a momentary relay chatter or power fluctuation, the reset may clear it.
If the oven was heating when F5 appeared, the relay may have been momentarily stuck — a reset sometimes frees it.
Check the bake and broil elements
Before replacing the board, test the bake and broil elements for shorts to ground. A shorted element can overload a relay and cause it to weld shut. Each element should show some resistance (15–30 ohms) but should read OL to ground.
A visual sign of a shorted element: look for a spot where the element is touching the oven cavity wall.
Inspect the control board
Access the control board and look for burn marks, discoloration, or damaged components around the relay area. A burnt relay trace on the board is a clear sign of failure.
Smell the board — a burnt electronics smell around the relays is a telltale sign.
Replace the control board
If the F5 returns after reset, or if board damage is visible, replace the electronic oven control board. Fix any shorted element first to prevent damaging the new board.
Always replace a shorted element before installing a new control board.
When to call a professional
F5 involves safety-critical relay circuits. If you're not comfortable diagnosing relay faults, a professional should handle this repair.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
Learn more about our sourcesParts you may need
Electronic Oven Control Board
Part #316576601 · $150–$350
If board relay has failed or board shows damage
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