Went through some anxious hours when I found that the MW would not turn off. The only way was to leave the door open. Not a solution. Tried a appliance repair that I knew, they didn't work on MWs. Spoke to the manufacturer, for $99 would come out and then tell me the real cost to fix. After more searching, even to maybe getting a new MW, (which necessitates getting a new bracket for the over the stove MW. They evidently are not standard, but proprietary to brands. Not good!)Buying a MW, okay, but someone has to put it in. Where are the good old days of selling, delivery, service? I'm from a small town, that's SOP.
I found PartSelect and called them. They didn't have the exact problem I had. They had a FAQ about the MW not starting. Mine wouldn't stop.
After describing what was happening, they had it in one. Looked at the plastic latch, bottom was curved out of shape. Door wouldn't close properly, causing it to run. It didn't heat, just ran. I ordered the parts. A spring and a latch. They came in quickly and my son and I began the repair. Found a You Tube on a similar type of door and they posited it might be the latch with step by step to follow. Ran back and forth from computer to kitchen.
Now, we didn't have the right tools to go along with the video we were watching. A long thin blade (about 12 inches) knife was used as the putty knife to pry up the edging that held the door glass. My son's long thin tiny philips screwdriver he uses to fix toys worked for the really tiny screws that held the latch part. We didn't have long nose pliers, but we messed up that part anyway, forgot to put in the new spring with the new latch. We worked it by hand and it went back together. Put it all together and discovered we forgot to put those tiny screws back at the latch. Wrestled the door back on and started it. Almost had a heart attack as it still was running when off. So unplugged,let it reset and it's been fine. Think it probably would have gone smoother with the proper tools. Anyway, glad I found PartSelect and that it was a relatively easy fix, even for those without tools and experience. A am a retiree, so don't feel you can't do it. Thank you so much PartSelect.