My wife was using our microwave this evening when all of a sudden it started acting weird. With the door closed, it would make a humming sound like it was trying to run, and it was beeping and flashing "error" on the display panel - not a good sound. I don't think an error code was being displayed, just the word "error". When we open the door the humming, beeping, flashing stops. With the door open we can set the clock and I even was able to "run" the unit just for a second to see if it would run (not good). I was thinking that perhaps a door switch quit working,so I opened up the unit and carefully pulled out each of the three switches, disconnected them and all seemed to work as expected (NO, NC) when operating them and checking the resistance between the common and terminal being tested. It has been a great microwave and I'm hoping someone might know what the problem is right away or what I should test next.
I did find the "technician guide/tech sheet/wiring diagram/etc" affixed to the inside of the cover after I opened up the unit. I'm not an expert in reading these diagrams but know a little bit about electronics and components. Any advice is greatly welcomed