Tower Door Interlock Switch Stuck or Miswired

Microwave interior light, fan, and turntable run when the door is open, or continue running after the door is opened.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Welded door switch contacts, misadjusted door latch, incorrect switch replacement wiring, broken switch mounting bracket

How to Fix / Troubleshooting

Danger: A microwave that runs with the door open is extremely unsafe. Unplug it immediately and do not use until repaired.

Checks (for technicians or experienced DIYers):

  • Remove the outer cover and inspect the door interlock switches and their wiring.
  • Verify that the monitor switch and primary/secondary switches are wired according to the Tower service diagram.
  • Replace any switch with welded or stuck contacts and repair any broken mounting brackets.

Recommendation: This is a critical safety repair and should be performed by a qualified technician.

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Repair Difficulty

Professional Required 5/5

Required Part

Door Interlock Switch Kit
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