How to Troubleshoot & Replace Ge AP3186054 / WB24X10103 Micro Switch-Substitute

Removed microwave from built in enclosure. Removed metal housing from the microwave to access the control system. Used electronic schematic and diagnosis flow chart that came with the microwave to troubleshoot the controls. Found blown fuse, bad primary interlock switch, and bad wiring connector to the switch contacts. Ordered replacement relay, also ordered replacement light since it was several years old. Parts came quickly as promised. Replaced bad fuse, bad switch, bad wiring connector, and light. Used volt-ohm meters to check the remaining control circuit components to try to determine if other damage existed. Found none so reassembled the microwave and tested it. Works great now. 

Found that the Primary switch had broken again after abut 2 years since last one replaced. I ended up replacing all switches since I had it open and the cost for the switches are minimal except the primary and secondary. I re-krimped the conectors as they are rather loose fitting. Plugged it in and it works. 

Unplugged microwave, removed cover. Removed and replaced micro switch that door latch contacts. reinstalled cover and plugged in unit. Its now working normal. 

As the micro switches and door latch mechanisms show signs of wear ( not fully engaging because of that) not knowing exactly which one caused malfunction I replaced all of them. A very tight working area made this job a slow one. Once replaced, I was back to heating up lunch and coffee.