Display shows L1 or low-temperature alarm; interior temperature drops well below the setpoint and may freeze bottles.

Safety: Unplug the cooler before accessing internal components. Handle glass bottles carefully if ice has formed.

Steps to address L1 / overcooling:

• Verify settings: Confirm that the set temperature is appropriate for wine storage (typically 45–65°F / 7–18°C). Reset to a higher temperature and see if behavior changes.
• Check sensor placement: Ensure that the cabinet temperature sensor is not touching the evaporator coil or directly in the cold air stream, which can cause the control to misread temperature. It should be positioned in free air inside the cabinet.
• Inspect wiring: Access the interior sensor and its wiring. Look for damaged insulation or signs of a short circuit (wires touching metal).
• Test the thermistor: With the unit unplugged, disconnect the cabinet thermistor from the control board and measure its resistance at room temperature. Compare to NewAir specs. A shorted sensor (very low resistance) can cause overcooling.
• Replace faulty sensor: If the thermistor is out of spec, install a new NewAir cabinet temperature sensor / thermistor and mount it correctly.
• Evaluate control board: If the sensor is good but the compressor runs continuously regardless of setpoint, the main control board relay may be stuck closed. In that case, replace the NewAir main control board (PCB).

Note: Persistent overcooling can damage wine. Until the fault is corrected, move valuable bottles to another properly functioning cooler.