SMEG Thermostat / Temperature Control Miscalibration

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

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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 cabinet NTC temperature sensor, Control PCB not regulating compressor correctly, Sensor not properly positioned on evaporator or wall

How to Fix / Troubleshooting

Safety: Unplug the unit before accessing interior panels or sensors.

Steps to correct overcooling:

  • Verify with a thermometer: Place an accurate thermometer inside and compare actual temperature to the display. If actual is much lower, suspect sensor or control issues.
  • Inspect sensor placement: Access the interior rear panel and locate the cabinet sensor. Ensure it is properly clipped in place and not touching extremely cold metal surfaces directly unless designed to.
  • Test and replace sensor: Measure sensor resistance and compare to expected values. Replace the SMEG cabinet NTC sensor if readings are out of range.
  • Control board replacement: If a new sensor does not resolve the issue, the main control PCB may be misregulating the compressor and should be replaced.

Interim measure: Raise the set temperature slightly to protect wine until the fault is corrected.

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Repair Difficulty

Medium 3/5

Required Part

Cabinet NTC Temperature Sensor
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