Display shows Lo and interior temperature is much colder than set point; bottles may be over‑chilled

Safety: Unplug the unit before handling sensors or boards.

Steps:

• Check actual temperature: Use a separate thermometer to confirm the real cabinet temperature. If it is near freezing, remove sensitive bottles to prevent damage.
• Inspect sensor connections: Access the interior rear panel and locate the zone sensor. Follow its wires to the main board and ensure the connector is fully seated.
• Test sensor: If possible, measure resistance across the sensor leads. An open circuit indicates a failed sensor that must be replaced.
• Replace sensor or board: Replace the NTC sensor if open. If the sensor tests good but Lo persists, the main control board may be faulty and require replacement.