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Microwave Not Working? Three Terminal Switch Testing, Repair

Microwave not working? This video demonstrates how to test a three terminal switch on a microwave. The door switch is a commonly replaced part for a microwave that is not working.
Other commonly replaced parts for a microwave that is not working:

Line fuse
Main control board
Thermal fuse
Thermoprotector

All of the information provided in this part testing video is applicable to the following brands:
Amana, Frigidaire, GE, Kenmore, LG, Maytag, Panasonic, Samsung, Sharp, Whirlpool
Find my part

Microwave Disassembly :

How your microwave works:

For more DIY videos including part replacement and help finding your model visit the repair help section of our website: Microwave repair help