Question about GE Spacemaker JVM1640SJ Microwave Oven

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Oven hums when turned on and doesn't heat, has burndt odor

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Thanks for using FixYa. If it’s a loud hum/buzz sound then 90% it’s usually a bad magnetron and other times it’s a bad high voltage diode. However, from what you have described it seems to be the magnetron. Please do accept the solution if the issue is resolved or post a comment for further assistance.


Posted on Jun 02, 2010

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Everything works except water won't heat up. .?

Check this video it goes through checking and replacing magnetron, capacitor, diode and fuse. It will be one of those. Check the safety instructions in the description.

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This indicates the magnetron has failed, "heart of the microwave oven" if everything else is working then the culprit is as stated above, often gives off a strong odor. In most cases it is cheaper to replace the oven rather than repair.

Mar 02, 2012 | LG LRM1230W Microwave Oven

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While changing the light bulb on the bottom of Whirlpool MH1140XM, the bulb popped. I replaced it but now all I get is a hum whether I push timer, light or oven settings. The oven appears to be heating...

Hello, Thank You for using FixYa. I will be helping you today.Make sure no wires were pinched in the process. The turntable motor runs off the board that's why im thinking you have a grounded wire somewhere.
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Jun 19, 2011 | Whirlpool MH1140XM Microwave Oven

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Very loud motor sound - smells like something is burning... and it doesn't heat at all

The magnetron in the microwave has failed, "heats food" and some cases gives off an odor that stands out. To repair the oven will approach the price of a new one

May 15, 2011 | LG LMV1680 Microwave Oven

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Mircowave does not seem to heat anything any more,does it need a fuse, or larger part replaced? model jvm 1440aa001. Thanks for your help

There are several reasons the oven can stop heating. The most common is failure of the magnetron tube, which generates the microwaves. If you've been noticing longer cooking times, unusual humming noises or an electrical odor, these are signs of a magnetron nearing the end of life. When they finally fail, it's one of two ways. They open electrically like a fuse blowing, so that everything seems like it's working but there's no heat, like you describe. Or they can short-circuit, which causes a very loud humming or groaning noise and no heating, and may cause the main power fuse to blow so that the oven goes completely dead.

Unfortunately, the magnetron is about the most expensive part in the oven. So while it could be replaced, it's usually not economical. Between the cost of parts and labor (this kind of repair is best left to professionals because of safety concerns), it may only be a little more money to buy a new oven. In some cases, repair may even cost more than a new one.

There are other possible causes. There may be bad connections that have developed or something has gone wrong on the control circuit board. Other parts in the power supply for the magnetron may have failed. If you want to keep this oven, see what the cost is for a professional to check it over and give a repair estimate. It may turn out to be worth fixing. But if the magnetron is bad, it's probably time for a new oven.

Sorry I can't be more positive, but thanks for using Fixya!

Dec 05, 2010 | General Electric Microwave Oven

1 Answer

The unit is 3 years old and when I turn it on there is a loud hum. Theunit also does not heat but turns the turntable?

From your description it sounds like the magnetron has failed in this oven. That's the part the makes the microwaves to heat the food. It typically fails by shorting out and making a loud hum noise. It not usually worth fixing since the price of a replacement magnetron is almost as much as a new oven.

Jul 01, 2010 | GE Profile Spacemaker JVM1871 Microwave...

1 Answer

Does not heat food

call that company server

Apr 05, 2010 | Kenmore 66292 Microwave Oven

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Our Sharp microwave oven turns on, makes a loud humming noise, starts to smell like something is burning, but doesn't heat. Well, actually, we don't think it heats, we're too scared to let it run because...

Normal 0 MicrosoftInternetExplorer4 /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-fareast-font-family:"Times New Roman";} This can be caused by grease etc. inside the oven and on the wave guide which is the paper like thing in the oven. If you can remove it look for burnt areas which may can be scraped off or you may need to replace it. An appliance parts store usually has the material you can cut to fit you own.

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