Question about GE JVM1850 1000 Watts Microwave Oven
It's probably the thermostat / thermal cutout (TCO) mounted on the magnetron or the cavity.
Be sure the end caps of the fuse are not loose. That can fool you.
You can usually find helpful exploded view diagrams and order parts by entering your full model number here.
There should also be a "mini-manual" hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting & testing.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Aug 09, 2008
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