Display shows "door" or a door icon; microwave will not start even though the door appears closed.

Safety first: Unplug the microwave before adjusting door components.

• Inspect door alignment: Check that the door sits squarely in the opening and that the gap is even all around. If the door sags, the hinges may be worn or loose.
• Check latch hooks: Ensure the plastic latch hooks on the door are intact and not cracked. They must fully engage the interlock switches.
• Test door closure: Close the door firmly and see if the "door" message clears. If gentle upward or downward pressure on the door makes the message disappear, the latch or hinges need adjustment or replacement.
• Inspect interlock assembly: Remove the control panel to access the latch and switch assembly. Tighten any loose screws and replace broken parts.
• Replace door switches: Test each door switch with a multimeter and replace any that do not operate correctly.