GE Monogram The microwave oven shut down and I found the fuse to be the culprit. First. Went to several hardware stores to find this elusive fuse and bought a $4 pack of two microwave fuses. I installed the first one and the microwave came to life. This took about 10 minutes. After pressing the open button on the device two or three times, it stopped again. After further diagnostics on YouTube, it was determined that the door lock switch was causing the fuse to trip. I tracked down the correctβ¦