La Cornue
Stuck Cooling Fan Relay or Faulty Temperature Sensor
Oven fan runs continuously even when oven is off and cool
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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
Relay on control board stuck closed, Shorted temperature sensor reading high, Wiring short between sensor and control, Faulty fan control thermostat
How to Fix / Troubleshooting
Safety first: Turn off power at the breaker before accessing internal components.
- Allow full cool-down: Ensure the oven has been off for at least an hour; some fans run for a period after use.
- Test sensor: Measure resistance of the oven temperature sensor at room temperature. Replace if out of specification.
- Inspect control board: Look for signs of heat damage near the fan relay. If the relay contacts are welded closed, the board must be replaced.
- Check fan thermostat: On some models, a mechanical thermostat controls the fan. Test for proper open/closed operation at room temperature and replace if stuck closed.
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Repair Difficulty
Hard
4/5
Required Part
Oven Cooling Fan Motor
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