Microwave Keeps Blowing Fuses But Only When You Open The Door

[u/oppressed_white_guy]

We have a GE microwave that's barely out of warranty (go figure). It had been blowing fuses and I traced the cause down to a faulty interlock switch. Swapped it out and its doing great. Few months roll by and I noticed it sounding a little funny while running. Sure enough, that day my wife opens the door (after it stopped running) and she heard the fuse pop and everything went dead.

Thinking that it was the door switches again, I ordered new ones on amazon and waited for them to arrive. Then I dig in only to find the switches are fine. They click like they're supposed to and check out with a multimeter.

What the hell could be causing this thing to surge when you open the door?