Question about GE Spacemaker JVM1640SJ Microwave Oven
My microwave shuts down after a few minutes of use. It is as if the circuit breaker tripped. After a few minutes I have to reset the clock and it operates. I notice there is more steam than I remember in the oven. Maybe the interval vent is not working?
It sounds like the magnetron is overheating and opening the thermostat.
This can be caused when the internal cooling fan is not running or by a magnetron that is failing.
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.
It is vital that the cooling fan runs, or the magnetron will be destroyed.
If you or someone you know decide to look into it, we have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa.
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 Dec 07, 2008
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