Logik Door Interlock Switches Miswired or Stuck

Microwave interior light, fan, and turntable run when 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

Stuck relay on control PCB, Misadjusted or welded door switch contacts, Incorrectly wired door switches after prior repair, Shorted control PCB

How to Fix / Troubleshooting

Danger: This is a serious safety fault. The microwave may generate microwaves with the door closed but without user command. Unplug immediately.

Steps (for technicians/competent DIYers only):

  • 1. Do not use the microwave: Leave it unplugged until repaired.
  • 2. Inspect door switches: Check that the common (COM), normally open (NO), and normally closed (NC) terminals are wired correctly according to the Logik wiring diagram.
  • 3. Test switches: Use a multimeter to verify that switches change state correctly when the door opens/closes.
  • 4. Check control relay: If switches are correct, the main power relay on the control PCB may be stuck closed and the board should be replaced.

Due to the safety implications, this repair is best handled by a professional.

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Repair Difficulty

Professional Required 5/5

Required Part

Door Interlock Switch Set
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