Problem: GE Microwave model JVM3160RF2SS trips kitchen breaker as soon as the cook cycle begins. Problem repeats on other circuits in the house.
As other posts indicate, check the door switch.
https://youtu.be/eP7CTUQgRvg
Not very technical, but quick to the point.
I found the middle switch to be nonfunctional. It's the one "n/c". Marked kw3at-16
Searched kw3at-16 on Amazon and went with all 3:
KW3A Microwave Oven Door Switch 16A 125V/250V Door Interloc (2 Normally Open and 1 Normally Close) https://a.co/d/emlGtGc
Now, I wait a day for the parts...