Refrigerator frequently beeps or shows a door-open alarm even when the door is closed.

Safety: Unplug before accessing sensor wiring.

Steps:

• Check closure: Ensure the door closes fully and the gasket contacts the cabinet all around.
• Magnet alignment: Verify that the door magnet strip aligns with the reed switch location in the cabinet.
• Switch test: Test the reed switch with a magnet and multimeter. Replace if it does not change state reliably.
• Hinge adjustment: Adjust hinges to improve alignment if necessary.