Display shows dO or "door" and an audible alarm sounds even when all doors appear closed.

Safety: Disconnect power before removing switch housings or hinge covers.

• 1. Confirm physical closure: Check that each door is fully closed and level. Adjust leveling feet so doors self-close.
• 2. Inspect gaskets: Look for twisted, torn, or hardened door gaskets. Warm and reshape minor warps with a hair dryer on low.
• 3. Test door switches: Press each door switch manually and see if the interior light responds. Replace any switch that does not change state.
• 4. Check hinge wiring: On models with door electronics, inspect the harness at the hinge for breaks.

Replace faulty door switches or repair harnesses to clear the dO alarm.