Wine cooler is too cold; bottles or labels show frost or ice even at moderate set temperatures.

Safety: Unplug the cooler before accessing sensors or the control board.

Steps:

• Confirm overcooling: Place a thermometer inside to verify the actual temperature versus the set point.
• Increase set temperature: Raise the set temperature and observe if the compressor cycles off after some time. If it does not, suspect a control issue.
• Test cabinet sensor: Access and test the cabinet NTC temperature sensor. Replace if resistance does not match expected values.
• Inspect control board relay: Look for signs of a welded or stuck compressor relay on the main board. If the compressor runs continuously regardless of settings, replace the main control board.
• Protect wine: Until repaired, unplug the unit or set it to the warmest setting to prevent wine damage.