Strange behavior after door switch replacement

That's a good point, but no. They're exactly the same. Two spade connectors on each, and common goes to normally closed. The diagrams on the side of both new and old are identical.

@Ryan Langan Well dang, was hoping it was something simple, but as long as the contacts are in the same position on both switches, that's not the problem.

You mentioned buying three switches; am I correct in assuming you only replaced the one?

You might want to grab that multimeter or a continuity tester and check the operation of all the switches when you open and close the door; I found that there can be some misalignment that keeps them from working even if they look like they're sitting correctly.

I've also run across switches that appear to be working; they click when they should but the multimeter showed they weren't actually working. I'd be especially suspicious of one that's a NC connection, as that's the disengage switch to cut power when the door is open.

@dadibrokeit Sorry for the late reply, I didn't get a notification. I replaced all three switches. It had issues and blew the fuse. I then pulled out the two new upper switches and put back the old ones. I tested them with a meter before putting them back. It blew the fuse again. I finally threw it out. Today, I picked up a free Kitchen Aid that wasn't working. I knew it could be a similar issue, but I have the two new Omron switches left, and lots of people seem to be able to fix their microwaves this way. The middle switch on the KA was bad, and I replaced it with an Omron, and still no joy. Didn't blow the fuse right away, but hitting start (+30 sec) killed it.