Door alarm sounds frequently even though the door appears closed and sealed.

Safety first: Unplug the unit before adjusting the door switch or accessing wiring.

Steps to correct:

• 1. Check door alignment: Ensure the door is level and square with the cabinet. Adjust leveling legs or hinge screws to correct sagging.
• 2. Inspect magnet and switch alignment: Verify that the door magnet lines up directly with the reed switch in the frame when closed. Adjust the magnet position if possible.
• 3. Test door switch: Replace the reed switch if it intermittently opens when the door is closed.
• 4. Control board check: If alignment and switch are good but alarms persist, the main control board may be faulty and require replacement.