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Microwave works only intermittently

It works, then it doesn't work. A little while later it works again. Is it overheating? if so, what if anything can be done about it? Unable to find owner's manual for this model

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  • 79 Answers

I had this problem on my microwave and found it was the safety switch on the door , The little microswitch was badly worn , Mapplins provided a simple replacement for £2 and it still works 10 years on..Please make shure the microwave is unplugged before you attempt any repair..

Posted on Jan 22, 2009

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Posted on Jan 02, 2017

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Oven on convection for 45 minutes sort of thud then went dead no lights nothing, fuse is ok came back to it 3hrs later and is working again?


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Maytag umc5200 microwave dies when oven runs too long


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I Have a GE Spacemaker over the stove microwave. I think it is 1000 watts. It's 7 years old. Everything works but it doesn't heat anything. There is 23 volts going to the fan unit in the...


HELLO.

Since there is an amount of volts from the outlet, the fault is from the microwave breaker.

The solution is given below.

Reset the microwave breaker.

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Microwave stopped working last night


If the microwave worked for a little while after you plugged it in again then it is just overheating.It is usually just dust/dirt collecting on the vents.the fan,and the magnetron(the thing the fan blows on).If cleaning all these doesn't solve the problem you may have a bad high temp overload sensor,and need to replace it.(this sensor is usually mounted directly on the top of the magnetron.The magnetron is the part that actually puts out the microwave signal.I've never seen a reset button.The high temp sensors reset themselves automatically.

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Whirlpool Microwave, No Power


could be a damaged door saftey

Jun 14, 2009 | Whirlpool Microwave Ovens

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Microwave lights and buttons work but doesn't heat up anything


When you start the microwave say for 1 minute. Listen closely when you hit start, the light should come on and about a 1/2 second later you should hear a little click and a slight hum. This means the controller is turning on the high voltage transformer and that part of it is working. My guess is that the magnatron is bad. That's the most common problems with all brands of microwaves. The mat on the top should not have caused the problem since the microwave has heat shutdowns in it. I would say that it's a 90% chance it's the magnatron. Most microwaves have a 5 year warranty on that part. Look at your owners manual. Good luck.

Scott

Jan 23, 2009 | Amana Radarange Microwave Oven

1 Answer

NNP-294 Dead


If it's intermittent or random, it may be a bad connection, usually on the control board or a loose fuse holder, or even an intermittent fuse.

You should do a continuity test on the fuse while it's in the holder (with the microwave unplugged, of course) then turn the fuse by hand or take it out and put it back in, then test it again.

If you remove the fuse, then press the meter leads against the ends, it can allow internal contact to be made and make a bad fuse appear to be good.

If you suspect the fuse at all, it's best to replace it.

With the microwave unplugged, if you can easily turn the fuse with your thumb & forefinger while it's in the holder, it has overheated and fatigued and the holder should be replaced.

Simply squeezing the holder's terminals together with pliers is not really a good solution.

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

An intermittent door switch will not make the unit intermittently dead, it will only make it not heat, and depending on the model, it will also likely make the turntable and inside light not come on. But again it depends on the model.

You may need to clean and/or realign the door mechanism or door switch mounts.

This is especially true in case a user opens the door while it's cooking without hitting Stop first or slams the door. Both are big no-nos for a microwave.

The main parts that will kill the power are the fuse, fuse holder, or thermostat or thermal cutout, which are usually located on or above the magnetron and on the top of the cooking cavity.

Please feel free to contact me directly if you need more help.

We're happy to help and we appreciate your thoughtful rating of our answer.

William E. Miller, AS-EET
prototech@usa.net
http://www.microwavedisplay.com

May 20, 2008 | Panasonic NN-P294WF Microwave Oven

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