Microwave light and fan come on when the door is opened, or the unit starts running when the door is closed 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
Danger: A microwave that runs with the door open is unsafe. Unplug it immediately and do not use it until repaired.
Steps (for experienced DIYers):
- 1. Inspect door switches: With the unit unplugged, remove the outer cover and control panel to access the door switch cluster. Check for burned or melted switches.
- 2. Check alignment: Ensure the latch bracket is not bent and that the door hooks fully actuate the switches.
- 3. Replace switches: Replace any switch that appears damaged or tests incorrectly with a multimeter.
If you are not experienced with appliance repair, have a technician correct the door interlock system. Do not operate the microwave until this is fixed.
Repair Difficulty
Required Part
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