Display shows F26; unit may not respond correctly to door open/close.

Safety first: Disconnect power before working around the door area.

• Check door closure: Ensure the door closes firmly and evenly. Adjust hinges or leveling if needed.
• Inspect door switch/lock: Access the door lock assembly and verify the switch actuator is not broken or worn.
• Reseat wiring: Confirm the harness to the door switch is secure and undamaged.
• Replace door lock/switch: If the unit does not detect door status correctly, replace the door lock assembly which includes the switch.

When to call a technician: If the control board is not reading the switch correctly, professional diagnosis is recommended.