Microwave light, fan, and turntable run when the door is closed, even without pressing START.
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
How to Fix / Troubleshooting
Immediate safety action: Unplug the microwave immediately. A microwave that runs with the door closed and no command is unsafe.
Do not use the unit until it has been inspected and repaired. The issue is typically a stuck relay or door switch logic fault on the control board. This requires internal electrical diagnosis and should be handled by a qualified technician.
Repair Difficulty
Required Part
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