I replaced the bottom door switch. I bought a new bottom interlock support bracket, but I couldn’t use it because the screw hole was a different size from my old bracket. I just used my old bracket even though I had broken one of the pins that go through the switch when I was removing my old switch. It still works fine with the one pin holding it in place. The microwave works like a charm now! Saved me $400.00 plus dollars, just spent $40.00 on the switch. It was an easy fix, I think anyone can replace this part.