Safety: Unplug the unit before adjusting hinges or replacing the switch.

Steps:

Check alignment: Verify that the door is square to the cabinet and closes fully. Adjust leveling feet and hinges as needed.
Inspect magnet and switch: Ensure the magnet is firmly attached to the door and lines up with the reed switch. Replace the magnet if missing or weak.
Test and replace switch: Use a multimeter to test the reed switch. Replace if it does not reliably change state when the door is opened/closed.
Reduce vibration: Address any excessive vibration that might cause intermittent switch activation.

Door alarm sounds frequently even though the door appears closed

Possible Causes