Insignia Door Switch or Relay Stuck ON

Microwave interior light, fan, and turntable run when the door is closed, even without pressing START.

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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

Shorted primary door switch,Stuck relay on control board,Incorrectly installed door switch bracket,Wiring short in door circuit

How to Fix / Troubleshooting

Safety Warning: This is a serious safety issue. Unplug the microwave immediately and do not use it until repaired. A microwave that runs with the door open or without a command can leak radiation.

Do not attempt to operate the unit again.

Technician-level outline:

  • Inspect and test all door interlock switches for proper operation and correct wiring.
  • Check the door switch bracket for misalignment or damage.
  • Test the control board relays for being stuck closed; replace the board if a relay is welded.

This repair should only be performed by a qualified microwave technician.

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Repair Difficulty

Professional Required 5/5

Required Part

Door Interlock Switch Kit
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