Wine cooler displays L1 and the internal temperature is much colder than the setpoint; bottles may be freezing.

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

Steps to address L1:

• 1. Verify set temperature: Confirm the setpoint is appropriate for wine (typically 40–65°F depending on type). Adjust if accidentally set too low.
• 2. Check sensor placement: Inspect the cabinet thermistor inside the compartment. If it is touching the evaporator wall or in direct cold airflow, reposition it slightly away so it senses average air temperature.
• 3. Test the cabinet thermistor: With the unit unplugged, disconnect the thermistor from the control board and measure resistance. A very low resistance (near short) at normal temperature indicates a failed sensor.
• 4. Replace the thermistor if defective: Install a new Insignia cabinet temperature sensor and route wiring as originally installed.
• 5. Evaluate the control board: If the sensor is good but the compressor runs almost continuously and L1 persists, the compressor relay on the main control board may be stuck closed. In this case, replace the main control board.

Tip: Until repaired, unplug the cooler or run it on a higher setpoint to avoid freezing valuable wine.