Thermador Overcooling – Sensor or Control Calibration Issue

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

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.

Possible Causes

Cabinet temperature sensor out of calibration, Sensor not properly mounted to the 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 the wine type).
Check sensor placement: Remove the interior trim and ensure the temperature sensor is properly clipped to the liner or evaporator area as designed. Reattach it if it is loose.
Test sensor: Measure resistance at a known temperature and compare it to Thermador specifications. Replace it if it is out of range.
Control board: If the sensor is correct but the unit still overcools, the main control board may be misregulating compressor run time and should be replaced.

Repair Difficulty

Medium 3/5

Required Part

Cabinet Temperature Sensor

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