Microwave Comes on when Door is Opened (by 3 users)

I've not tried your fix yet. I may try it, but this is why I'm skeptical as to why it would work and possibly why your response got a poor rating. None the less, I do appreciate your response.

In one way I can see where the switches may be the problem, but logically, I have a hard time understanding how.

The reason is that if the switches were stuck and kept the circuit closed instead of breaking it when the door is opened, then it makes sense. But with my microwave, the door can be shut and the microwave off (timer timed out); then, when the door is opened the microwave immediately comes on. How could the switches being stuck cause this?

Well. The top switch on the door actually was the problem. It was sticking in the closed position. I exercised the actuator and sprayed some WD40 on it and it's working fine now.

As a side note, after looking at the schematic and tracing current flowpaths, only the fan, turntable and light were coming on when the door was opened. In order for the magnetron to power up, all three switches on the door have to be have to be made.

Thanks for your help MicrowaveSvc.

The above comment shown from guest is from Jeff C. I had not signed in prior to posting it.