Thermador Overcooling – Sensor or Control Calibration Issue

Wine cooler too cold; bottles or labels may show signs of freezing near the back.

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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

Cabinet temperature sensor out of calibration, Sensor not properly mounted to liner or evaporator, Faulty main control board, Incorrect temperature setting or mode

How to Fix / Troubleshooting

Safety: Disconnect power before accessing interior panels or sensors.

Steps:

  • Verify settings: Confirm the set temperature is appropriate for wine storage (typically 45–65°F depending on wine type).
  • Check sensor placement: Remove interior trim and ensure the temperature sensor is properly clipped to the liner or evaporator area as designed. Reattach if loose.
  • Test sensor: Measure resistance at known temperature and compare to Thermador spec. Replace if out of range.
  • Control board: If sensor is correct but unit still overcools, the main control board may be misregulating compressor run time and should be replaced.
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Repair Difficulty

Medium 3/5

Required Part

Cabinet Temperature Sensor
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