Interior temperature fluctuates widely; some days too warm, other days too cold, without changing settings.

Unplug before panel removal, but you can observe behavior with power on.

• Check loading: Avoid blocking interior air vents with bottles. Maintain space between bottles for airflow.
• Inspect sensor: Locate the Luma cabinet temperature sensor and ensure it is properly mounted and not touching a cold wall or warm light housing.
• Reseat connectors: Reseat the sensor connector on the control board to ensure a solid electrical connection.
• Replace sensor or board: If fluctuations continue, replace the sensor. If still unstable, the main control board may be misregulating and should be replaced.