Chosen Solution
Shows F-3 on the screen. Turns on by it’s self sometimes. I replaced the control board and it still does the same thing?
@emastin the F3 error code on a GE microwave is a failed keypad for the control panel. This would be consistant with your microwave sometimes starting by itself. MW can pack a pretty good (electrical) punch, so unless you know what to do, I’d be either replacing it or taking it in for service. For educational purposes take a look on here to see how involved this would be.
