Question about GE Spacemaker JVM1640SJ Microwave Oven

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XL1800 GE Spacemaker Microwave oven "dead"

My son was using the oven as a timer with nothing inside. After 15 minutes it went dead. We replaced the fuse but it is still dead. Nothing, nada. Any advise? Thanks! Annamarie

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It's not good to run ANY microwave with the oven cavity empty. The items you place inside to cook or heat up act as a "load" and help to absorb/dissipate some of the RF energy. Your microwave has several thermstats installed that will blow in an overtemp condition. If you're lucky the Magnetron is still intact and only a thermostat has failed. The thermostats are small cylindrical devices mounted near the magentron and the oven cavity. They act as fuses and must be reset if blown. Go to and select "Parts & Accessories". Go the bottom of the next page and type in your model number. On the Search menu page select the second menu and type in "thermostat". There will be a series of thermostats listed with helpful drawings on where to locate them. I would advise you to check these drawings first and see if you can locate the thermstats to determine if they are bad. The thermostat should read a short (or very low resistance) if it is good. The part numbers are as follows:

Duct Thermostat (Item 27) ----------WB27X10714
Plate Thermostat (Item 115) ------- WB27X10713
Bi-Metal Thermostat (Item 110)-----WB27X10788

They all cost about $15.00 a piece.

Some additional advice: Make sure you unplug the microwave before servicing. If you are not savvy when it comes to electronics, or have never worked on a microwave before, it may not be adviseable to work on this yourself. Voltage potentials inside the High Voltage section of a microwave oven (where the Magentron is located) can be dangerous. There is a large capacitor that can store a charge and can be a shock hazard.

I hope this isn't discouraging to you, I just wanted to make you aware of some of the possible hazards associated with this appliance. I hope you find information helpful, and let me know if you need further assistance.

PS The alternative if all the thermostats are good, would be to check and/or replace the magnetron. (Item 73, Part #WB27X10305 at $115.00)

Posted on Apr 24, 2008


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