Advice needed for replacing a microwave fuse
Be aware that there are typically multiple micro-switches in a microwave oven that are designed to have a special operating sequence that prevents the magnetron from getting energized when the sequence is violated. The operating sequence of these switches is interconnected mechanically with the door open and latch mechanism. One very common way that the lockout works is that if the micro-switch sequence is violated one switch is wired across the AC power inputs in such a way as to force the input protection fuse to blow out.