Thermador Door Switch or Control Logic Failure

The interior lights stay on when the doors are closed, causing heat and condensation.

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Possible Causes

Stuck door switch, Misaligned door not pressing the switch, Main control board not recognizing that the door is closed

How to Fix / Troubleshooting

Safety first: Unplug the refrigerator before working on switches.

Steps to check:

  • Check switch action: Press each door switch manually and verify that the lights turn off. Replace any switch that fails.
  • Adjust doors: Ensure the doors close fully and make contact with the switches.
  • Control issue: If the switches are good but the lights remain on, the main control board may be faulty and require professional replacement.
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Repair Difficulty

Easy 2/5

Required Part

Door Switch
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