Wine cooler runs continuously and gets very cold; bottles may freeze even at normal setpoint.

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

Steps to correct overcooling:

• 1. Verify temperature with a separate thermometer: Place an accurate thermometer inside to confirm actual temperature versus display.
• 2. Adjust setpoint: Raise the set temperature and observe whether the compressor cycles off. If it does not, suspect a control fault.
• 3. Test cabinet thermistor: Remove and measure resistance at known temperatures. Replace if readings are out of spec or unstable.
• 4. Inspect control board relay: Look for a relay that appears heat-damaged or stuck. If the compressor runs constantly regardless of control signals, replace the main control board.
• 5. Protect wine: Until the fault is corrected, move sensitive bottles to another storage location to prevent freezing.