Question about GE Microwave Ovens
The parts I would suspect are (in order) the TCO (aka thermal cutout / thermostat) located on the magnetron, the TCO on the top of the oven cavity, the bottom TCO (not to be confused with the hood TCO, which should read open), or the 20A ceramic line fuse, which is likely to be located on a filter board near where the cord comes into the unit.
Accessing some components (especially the oven cavity thermostat) for testing and possible replacement will require you to remove the oven from the wall and take off the outer cover.
If so, the installation instructions are very handy, and it's best to have two people since the microwave can be heavy and awkward.
You can download GE owner's manuals and installation instructions here.
There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.
At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.
You can find helpful exploded view diagrams and order parts by entering your full model number here.
It is vital that the internal cooling fan runs whenever the oven is cooking, or the magnetron will be destroyed.
When I say internal cooling fan, I do not mean the hood vent exhaust fan which you can turn on and off manually.
I'm instead talking about the internal fan which comes on automatically whenever you microwave.
We have a sound clip of what a microwave should sound like when the cooling fan and high voltage section are operating here.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Jun 28, 2009
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Posted on Jan 02, 2017
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