Question about GE JVM1630 Microwave Oven

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Microwave shuts off after a few seconds.

We have a four year old over the range microwave oven that shuts off after only a few seconds. My confusion lies in that the GE service tech tells me the transfomer is gone and needs to be replaced. If it is damaged or shot why does it allow us to cook some items and shuts off on others after only a few seconds?

The microwave was not put on its own outlet when it was installed. We suspect this may have played a part in its troubles.

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I am surprised that the GE seervice tech did not explain to you why the microwave will still cook. By saying that transformer is damaged or shot really means that the internal windings may be shorted together so the transformer no longer has as many good windings to produce the original power it did when it was new. That is pretty clear. It will still function a little but the protection circuits inside the microwave would start to shut it down when it overloads by trying to pull more current than the windings inside the transformer can handle. You can replace the transformer yourself if you are a do it yourselfer and are confident around unplugging the transformer with All Power Off and unscrewing a couple of screws that hold it in place. It is pretty straightforward you just need to find the correct transformer (maybe you can buy one from GE or go to which carry all the parts in microwaves for all models especially name brands like yours. Taking the cover off is of course easy. Good luck. Let me know how you do or if I can help you in any other way.

Posted on Jan 26, 2009


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I have the combination micro/oven..C-970-419532, s/n NF34332819

When a microwave oven shuts down prematurely it is often due to a defective high voltage component such as the diode string, a high voltage capacitor or, more likely, a defective magnatron (microwave power generator). If your microwave oven is more than four years old, consider it a sign from God that recalcitrant electronic pariah has yet to burn your house down!

If you are a cheap weasle and willing to possibly die for hot food, you can buy a replacement magnatron and spring new life into that old, slime-filled microwave oven! It's ture! (I've done it.)

There are just four manufacturers in the world for such things and all of them do what they do far from American soil. For about $60 you can beget a repalcement magnatron then wade into the exciting world of microwave energy production, waveguide and antenna theory, and the wonders of high voltage power electronics. (I'd mention embedded microcontroller theory but everyone knows that today.)

On the other hand, a busy executive person or similar form of incurious being would have just gotten off the phone to Best Buy, having been imbued with the many exciting and wife-pleasing possibilites that are innately manifest in a microwave oven you have yet to own.

In short, all your hot food wants is money. Give it money and hot food will be yours again!

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