01 - Door Switch
A door switch might be failing intermittently. Check each of the door switches for signs of overheating, arcing, or burning. If you don’t see any obvious signs of failure, use a multimeter to test each switch for continuity. If any of the switches is visibly damaged or only has intermittent continuity, replace it.
Here’s the part: https://www.repairclinic.com/PartDetail/...
02 - Thermostat
If the microwave runs for a few seconds and stops the thermostat might be defective.
Here’s the parts:
https://www.repairclinic.com/PartDetail/...
https://www.repairclinic.com/PartDetail/...
Reapir video:
https://www.repairclinic.com/PartDetail/...
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