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GE Microwave Not Heating Replace Magnetron WB27X11079

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There are other videos with possible causes and solutions on YouTube.

A common symptom of a failed magnetron is a failure to heat with everything else (magnetron fan, stirrer, timer, etc.) working fine. Check the GE manufacture date for the unit on its nameplate to determine the age of the magnetron. For GE models of the past, magnetrons had a 10 year parts replacement warranty. Magnetrons can be expensive, so you need to weigh all your options, i.e., repair versus replacement, before you commit to one solution.

Likely a magnetron problem. I know they want approx. $150 just for the replacement part. It sits toward the back of the unit. Unless you are in love with your existing unit, it's likely time for it to visit the curb.

Check thermal fuse cut out gone..

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, near the blower housing.)))

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)))

Hi, there are three issues that will cause a no heat situation in a microwave. these issue are a failed Magnetron, busted cut-off fuse and, failed diode.

I recommend checking all these area that are located inside the microwave for faults.

The most common issue will be a failed Magnetron.

The diode and, fuse will be located on the noise filter assembly.

un plug remove cover find red lead to magnetron with thick long plastic round blob this contains a long glass metal ended fuse that has probably blown due to running when empty long fuse is necessary to stop hi voltage flashing over airgap when fuse blows when fuse blown no output from magnetron as hi volts missing steve t

It could be the Magnetron. First, If the unit is out of warranty, you can try to remove the rear cover (make sure unit is unplugged) and see if there is a blown fuse in the section that powers the Magetron. If all the fuses are good, I would suspect a faulty Magnetron. The Magnetron is the microwave tube which makes the food cook. They are not too difficult to replace. MCM Electronics sells them and you can call them with your model and they can find a replacement for you will be able to see how much it will cost.
http://www.mcminone.com/search.asp?keyword=magnetrons

1-800-543-4330

Good Luck,

- Jim

Generally, the most common causes of a failure to heat are:

- bad door switches or door switch mounts
- loose connection at the magnetron
- problem or loose connection on the control unit circuit board
- bad magnetron or other high voltage part

If you or a friend decide to look into it, we have critical safety information, info on door switch diagnosis and replacement, and
disassembly information at our site, linked here on Fixya: http://tinyurl.com/yzjozk

You can usually find helpful exploded view diagrams and order parts by entering your full model number here: http://tinyurl.com/gv383