Wine cooler runs but interior temperature is too cold even at a high setpoint

Safety: Disconnect power before accessing sensors or the control board.

Steps:

• Confirm with thermometer: Place an independent thermometer inside to verify that the actual temperature is lower than the setpoint.
• Inspect sensor placement: Ensure the cabinet temperature sensor is mounted in free air, not in direct contact with the evaporator coil, which can cause false readings.
• Test sensor: Measure resistance of the NTC sensor at known temperatures. Replace the cabinet NTC temperature sensor if readings are out of specification.
• Check compressor relay: If the compressor runs almost continuously regardless of setpoint, the relay on the main board may be stuck. Replace the main control board if necessary.

Temporary workaround: Until repaired, raise the set temperature to reduce overcooling, but monitor wine closely.