Question about GE Microwave Ovens

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MICROWAVE HUMS WHEN DOOR IS CLOSED.EVERY THING ELSE WORKS FINE.

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  • Will Beames
    Will Beames Dec 16, 2008

    I have the same problem. My GE1800XL (2002) worked fine then one day it finished cooking and I removed the food. When I closed the door I noticed a burning smell and the clock was off. I unplugged it and plugged it back in and it started to make a humming sound which would stop if I opened the door. It still hums if I run it with a glass of water inside. I took it down off the wall and took the cover off and found the humming to be coming from the main transformer which would start to smell warm (I'm not touching it!) after a few seconds. After a few months of no microwave I was lucky enough to find a 2001 1800XL on craigslist for $60 so bought it and tried to replace my transformer with the transformer from the new one but had the same result. You may ask why I don't just use the new one - mine is stainless steel and the new one is white. So, at this point, the white one is on the wall and the stainless one is in my basement while I try to figure out what's wrong. If anyone has any suggestions I'd like to hear them.

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Perhaps a fluorescent ballast or transformer is letting you know it's going bad; it might just need to be reset (see the manual as well as trying to unplug/wait/replug.)

Failing that, It is simple enough to unplug it, put it on a test bench, disconnect the lamp and see if it still hums; if not the lamp, you will have a better idea what is humming with the lid off, but stay inches away of the (usually well-packed-away) high voltage feeds to the magnetron as you do.  It could be that you just have junk inside the door switch and can unplug, clean out the switch interior (crumbs sneak in!) and put it back for a fix; or a stuck stirrer at the RF feed off the magnetron.

Posted on Jul 01, 2008

  • Aleta Morriss Oct 08, 2013

    but why does it only hum when door is OPEN doesnt do this when door is closed

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Chances are that the secondary (cook) relay on the control circuit board is shorted, meaning that the oven is actually cooking any time the door is closed.

You can test that by putting in a cup of water, shutting the door, and letting it go for about 30 seconds, then checking the water temperature.

This is dangerous, and can lead to a fire, so please unplug the oven until it is repaired.

The relay can be replaced for far less than the cost of a new control circuit board.

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I suspect your door safety interlock switches are selded in the closed position. Remove the cover and look on the right hand side for these small switches. Unplug the device and be mindful there is 25,000 or more volts waiting to get you in the silver thing to the back side. Check the switches with a ohm meter. There is a common terminal, a normally open terminal and a normally closed terminal. My guess is one or both switches are going to read closed (short)

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This is usually caused by either a bad door switch, a loose door switch mount, or a problem on the control panel.

Even though a door switch clicks, it may still be bad inside.

Switch or mount trouble can be caused by slamming the door or by opening the door while it's cooking without hitting the Stop pad first.

If you or a friend decide to look into it, we have critical information on safety, disassembly and door switches at our site, and our link is at our listing here on FixYa: http://tinyurl.com/yzjozk

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

If you think the problem is on the control panel, which we repair these nationwide for $39.95 postpaid.

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that thing is usually the little secures attach to close the oven..

if its not a microwave, the problem might still be something similar to this..

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