Wine cooler is too cold; wine is near freezing even at a moderate setpoint.

Safety: Unplug before accessing sensors or the control board.

Steps:

• Verify with thermometer: Place a thermometer inside and compare to the setpoint. If actual temperature is much lower, proceed.
• Inspect thermistor placement: Ensure the sensor is not touching the evaporator coil directly unless designed to; it should sense cabinet air.
• Test thermistor: Measure resistance and compare to spec. Replace if readings indicate a much warmer temperature than actual (causing overcooling).
• Check control board: If the compressor runs continuously even when the setpoint is reached and sensors are good, the compressor relay may be stuck and the board should be replaced.