Thermador
Fan Control / Air Circulation Logic Issue
Interior fan runs constantly or cycles rapidly, even when temperature is stable.
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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
Faulty evaporator fan motor feedback (if equipped), Temperature sensor misreading, Control board fan logic fault, Door switch not registering closed
How to Fix / Troubleshooting
Safety: Unplug the unit before accessing fans or sensors.
Steps:
- Check door switch: Ensure the door switch operates correctly; a stuck open switch can cause continuous fan operation.
- Verify temperature: Confirm actual temperature is stable with a thermometer. If not, address cooling issues first.
- Inspect fan: Access the evaporator fan and check for ice buildup or obstructions. Clear as needed.
- Sensor test: Test the cabinet temperature sensor and replace if out of spec.
- Control board: If hardware is good but fan behavior is abnormal, the main control board may need replacement.
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Repair Difficulty
Medium
3/5
Required Part
Evaporator Fan Motor
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