i have a ge micro. and it has 3 door switches are they all normally closed or normally open at the same time

mark, July 2006

There is, however, a sligth timing difference

juhani, March 2008

Have not worked on this brand of microwave but with the door open I would expect to have two open circuit and one closed. The closed one being a back-up safety feature to blow the fuse if the others fail. The microswitches usually state on them N/C or N/O contact at the tag that is wired but you could always check continuity using an ohm meter with the unit unplugged. Beware of capacitor charge even although unplugged.

sparky, July 2006