Display shows L1 and the cabinet temperature is much lower than the setpoint; bottles may be too cold.

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

Initial checks:

• Verify settings: Confirm the set temperature is correct for wine storage and that the unit is not in a rapid-cool or demo mode.
• Power reset: Disconnect power for 10 minutes to reset the control logic. If L1 returns and the unit continues to overcool, proceed.

Hardware checks:

• Inspect temperature sensors: A sensor that reads too warm can cause overcooling. Test cabinet and evaporator NTC sensors with a multimeter and compare to expected resistance values.
• Check main PCB: Look for a compressor relay stuck closed (contacts welded). This may keep the compressor running regardless of temperature.
• Replace faulty parts: Replace the temperature sensor if readings are incorrect. If sensors are good, replace the main control board.

Note: Overcooling can damage wine. Until repaired, unplug the unit or raise the setpoint and monitor temperature closely.