Question about Microwave Ovens

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Our microwave appears to be working normally, ie the light goes on and the turntable goes around but it doens't heat....

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  • Microwave Ovens Master
  • 9,030 Answers

Chances are it has a bad connection at the magnetron, a bad high voltage diode, or a bad magnetron.

Any unusual noises?

Is it louder or quieter than usual?

Here are some links you or someone you know can use (in order given) for test help, but read the safety warnings first:

http://www.gallawa.com/microtech/diode.html (if it is NOT shorted, it's probably fine)
http://www.gallawa.com/microtech/mag_test.html
http://www.gallawa.com/microtech/xformer.html

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 Sep 26, 2008

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My JVM1653 stopped cooking, The turntable turns


your magnetron might be out. its what heats

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My Russell Hobbs microwave will not generate heat


If everything else is normal, the trouble may be a failed magnetron tube (the microwave source), problems on the control circuit board, or parts in the tube power circuit that are bad. It's also possible a door switch can be at fault, but this usually keeps something else (fan, turntable or light, most often) from running as well.

Microwave servicing is best left to professionals. There are potentially deadly voltages present, and a chance of microwave leakage if repairs aren't done correctly. Take the oven to a shop for an estimate, or just consider replacing it if it isn't a built-in, an over the range unit or a high-end countertop model.

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Not heating


If the oven is doing everything else properly (light comes on, fan runs, turntable goes around) but there's no heat, you may have a failed magnetron tube (the microwave source). There's also a relay that controls power to the tube that may not be working correctly, or the control circuit board is bad. It's also possible one of the door switches is not working (so the oven thinks the door isn't closed), although this usually keeps the turntable and fan from running.

Microwave oven service is not for do-it-yourselfers. There are potentially deadly voltages present even with power off, and a chance of microwave leakage if repairs aren't done properly. Let a professional give an estimate to repair it, or just replace it if it's under $100. (When I was servicing these things it wasn't unusual for a repair to cost over half the price of a new one. That's one of the reasons so few shops still work on small appliances.)

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MICROWAVE NOT HEATING


Most likely you have a magnetron problem. Easy to replace (DYI) but make sure the high voltage capacitor is fully discharged first against the case.

Dec 11, 2009 | Kenmore 62622 Microwave Oven

1 Answer

Microwave won't heat. turntable works control


Hi! check the fuse that goes through the magnetron because i think it is no functioning.

Sep 10, 2009 | General Electric Microwave Oven

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Microwave does everything that it is supose to do just that it does not heat and the noise to heat increased. This happend yeaterday.


HI. in most cases, this will lead to a failed Heating device(magnetron tube).It would be wise to check the Magnetron cutoff fuse to be sure of its integrity. if the fuse is blown, simply replace it. if the fuse continues to show continuity, replace the magnetron.

(((The fuse is located inside the unit along side the magnetron)))

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Loud pop and microwave doesn't heat anymore


I have a GE Profile Spacemaker model JVM3670WF001, purchased I think in 2003. Pop sound, no Heat. Light goes on, carousel goes around,
Repair or new microwave

Jun 03, 2009 | GE Profile Spacemaker Over-the-Range...

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Have GE JVM2050 over the range microwave, which stopped heating food and water since this morning. All other functions including light, key pad, clock, turntable work normal. The magnetron sound also


if everything works except the heating, it is most likely the mag tube is on its way out.........that is the most common reason for it not too cook.......since the microwave is a GE and it is 3.5 years old, i would say you are better off buying a new microwave, the mag tube starts at around $70.00 and up + the labor it costs too have a service person put it in........around another $60.00

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1 Answer

Turntable goes around when the door is open and the microwave is off.


Do not run the microwave with the door open. You will be cooked. Sooner or later, if there are enough microwave ovens, (and there are), everything that can go wrong with them will, eventually. There are several interlocking safety systems built into every microwave so that they won't work with the door open. Yours may have failed. I've never come across one, but that doesn't mean it can't happen.
It may only have a fault making the fan and turntable operate, which can sound like it's working with the door open. Either way, get it checked or get a new one.
This assumes that the microwave isn't actually supposed to do what it is doing under normal conditions or current programming. Refer to manual/instructions if unsure.:::Spiceweasel.au

Apr 03, 2008 | Kenmore 80809 Microwave Oven

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