If they are meant to be user replaceable, you can download the owner's manual here.
If not, you will have to disassemble the oven.
You can find helpful
exploded view diagrams and order parts by entering your full model
number here.
Accessing some components for testing and possible replacement will require you to remove the oven from the wall.
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.
We're
happy to help you with free advice and we'd appreciate your thoughtful
rating of our answer.
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