Vestfrost Overcooling / Thermostat Calibration Error

Wine cooler interior is too cold; bottles near the back may partially freeze even at normal setpoint.

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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

Misreading cabinet NTC sensor, Poor sensor placement against evaporator, Stuck compressor relay on PCB, Incorrect thermostat calibration

How to Fix / Troubleshooting

Safety first: Unplug the unit before accessing internal panels or the control board.

Steps to check and fix:

  • 1. Verify with a separate thermometer: Place an accurate thermometer in the middle of the cabinet to confirm actual temperature versus display.
  • 2. Adjust setpoint: Increase the set temperature by a few degrees and monitor. If the cabinet remains too cold, continue diagnosis.
  • 3. Inspect cabinet sensor: Access the interior rear panel and locate the NTC sensor. Ensure it is positioned correctly and not pressed directly against the evaporator, which can cause false low readings.
  • 4. Replace sensor if suspect: If the sensor is out of specification or physically damaged, install a new Vestfrost-compatible NTC.
  • 5. Check compressor relay: On the main PCB, inspect the compressor relay for welded contacts. If the compressor does not cycle off when it should, replace the control board.
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Repair Difficulty

Medium 3/5

Required Part

Cabinet NTC Temperature Sensor
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