Microwave light, fan, or turntable runs when the door is open, or unit attempts to heat with door open.
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
Danger: This is a serious safety hazard. Unplug the microwave immediately and do not use it until repaired.
Inspection (unplugged):
- Access the door switches and verify they are correctly wired and firmly mounted.
- Test each switch with a multimeter; replace any that are stuck closed or do not change state.
- Inspect the interlock bracket for cracks or misalignment.
If the control board is energizing components with the door open despite good switches, the board must be replaced by a professional.
Repair Difficulty
Required Part
We may earn a commission from links on this page.