Question about GE Spacemaker JVM1640SJ Microwave Oven

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Microwave will not heat

Everything seems to be working it just want heat or cook the food.

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Re: microwave will not heat

Had the same problem--the timer would even count down. The magnetron fan would not turn on, and the microwave would not heat. Checked out several components, but ended up being just the door latch out of adjustment! Be sure to discharge the capacitor before messing around in there. It keeps a charge even when unplugged. Short out the unused terminal on the capacitor to a screw in the chassis, using a short length of insulated wire.

Posted on Sep 13, 2007

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Will not heat

If everything else is working fine, the magnetron is the likely problem, "heats food and is the heart of the microwave oven" if more than five years old cheaper to replace the whole item.

Mar 02, 2012 | Whirlpool Microwave Ovens

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Not heating


Power Supply

Check whether there is a proper power supply. Look to see whether the cord is connected to a grounded 3-prong outlet and the cord is fully plugged in. If the electrical system is built-in and no power cord is visible, replace or reset the household fuse or circuit breaker.

Microwave Functions

Some basic microwave operational steps may affect whether the microwave is heating. Open and close the microwave door, as the unit will not function with the door open, and push "Stop/Clear" to cancel any previous settings, such as the timer, which do not heat the microwave oven.

Setting the Microwave

Once the power to the microwave has been reset, or verified as working, and the microwave is ready to run, select a new cook cycle and press "Start" to see if the microwave begins to run and cook food as expected. Allow the food to cook for the alloted time and then open the microwave door and check to see if the food has cooked or heated. Choose a longer cooking time and restart the microwave if food is heating but is cooking slowly.


If all efforts to troubleshoot the function and power to the microwave still do not get the appliance heating food as expected, there may be a repair issue that needs to be addressed. Contact professional technician for advice.

Oct 05, 2011 | Sanyo Microwave Ovens

1 Answer

Everything works but food does not heat up I have a ge over the range microwave

If everything seems to work, except cooking the food it is probably the magnetron which sells for $100-$150 for the part alone.

Jul 07, 2011 | GE Microwave Ovens

1 Answer

Lg 700 w microwave everything is working as normal but the food is not heating up

There three parts that will cause this, the first is the magnetron "heats food" the most expensive part, followed by the high voltage capacitor and diode, they work in conjunction to generate the high voltage to cook the food.

Feb 03, 2011 | LG Microwave Ovens

1 Answer

Microwave runs but food does not heat

If everything appears to work as normal but does not heat, then the magnetron will be faulty. This is the device which cooks the food, however this can be an expensive part to replace & may not be economical to fix.

Sep 23, 2009 | General Electric Microwave Oven

1 Answer

The microwave runs but doesn't cook the food. It made sort of vibrating noise and stopped heating. Everything else seems to be working.

HI. this is called Magnetron failure. you will need to replace this failed device. it is responsible for the heating of the contents.

Jun 07, 2009 | Maytag MMV4205 Microwave Oven

1 Answer

Microwave is not heating food

Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips


Mar 25, 2009 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Everything works except the cooking part/no heating/turntable not turning, help!

you may have gotten a power surge and that can cause some funny things to happen, 1st is there power to the oven, 2nd if so there may be an internal fuse protector built in to the oven, check with the manual for anything of that sort listed. if not you may have to take it in and have it repaired by a pro. there is a lot of voltage in these ovens and unless you know what you are doing a person could get hurt

Jan 03, 2009 | Whirlpool GH4155XP Microwave Oven

1 Answer

Express cook doesn't heat. Time cook seems to work at least sometimes

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Oct 04, 2008 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Everything works...Except for actually heating the food

It has a bad magnetron. This is the tube that provides the microwaves to heat the food. Not too easy to replace yourself but it can be done. Cost of magnetron is probably less than $50 or $60.

Dec 14, 2007 | Frigidaire PLMV168 Microwave Oven

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