Beeping alarm sounds periodically even though temperature appears normal and door is closed.

Unplug before adjusting switches or boards, but you can test door behavior with power on.

• Door switch alignment: Ensure the door magnet and Luma door switch or reed sensor align perfectly. Adjust hinges or switch position if needed.
• Reseat sensor connectors: Reseat the cabinet and evaporator sensor plugs on the control board.
• Check for vibration: Excessive vibration can momentarily open the door switch. Level the unit and secure shelves.
• Alarm settings: Some models allow alarm disable or delay; consult the user manual to adjust if available.