Princess Door Safety Interlock Miswiring or Stuck Relay

Microwave interior light, fan, and turntable operate with the door open, or the unit attempts to run when the door is not fully closed.

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.

Possible Causes

Stuck power relay on control board, Misaligned or welded door switch contacts, Incorrectly reassembled door switch bracket after prior repair, Shorted wiring harness

How to Fix / Troubleshooting

Danger: This is a serious safety hazard. Unplug the microwave immediately and do not use it.

Do not attempt to operate: Running a microwave with a faulty door safety system can cause microwave leakage.
Do not attempt DIY internal repair: Door interlock circuits must be correctly wired and tested with specialized equipment.
Professional service only: Contact a qualified technician or Princess service center to inspect and repair the door interlock system and control board.

Repair Difficulty

Professional Required 5/5

Required Part

Door Interlock Switch Set

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