Safety: Unplug the unit before working on the door switch.

Check door closure: Ensure the door fully contacts the frame and is not obstructed.
Inspect magnet and switch: Verify the door magnet is present and aligned with the reed switch. Replace missing or loose magnets.
Test switch: Use a multimeter to check the reed switch operation. Replace if it remains closed regardless of magnet position.
Control board: If the switch is good but the light remains on, the main PCB may be faulty and require replacement.

Interior light stays on even when door is closed

Possible Causes