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

Steps to address L1:

Verify set temperature: Confirm that the setpoint is not accidentally set too low. Adjust to the recommended wine storage temperature (typically 45–65°F depending on zone).
Power reset: Unplug the unit for 10 minutes to reset the control. If L1 returns and the unit continues to overcool, proceed.
Check thermistor placement: Ensure the cabinet temperature sensor is not touching the evaporator coil or an air outlet, which can cause falsely low readings.
Test thermistor: Measure resistance at known temperatures and compare to specifications. Replace if readings are out of range.
Inspect control board relays: If comfortable, visually inspect the main board for a stuck or burnt compressor relay. A relay welded closed will keep the compressor running constantly.
Replace faulty parts: Install a new thermistor or main control board as indicated by testing.

Note: Overcooling can damage wine. Until repaired, unplug the unit or raise the setpoint and monitor with a separate thermometer.

Display shows L1 and interior temperature is very low; bottles may be over-chilled.

Possible Causes