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MAIN OVEN IS NOT HEATING UP - Microwave Ovens

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The magnetron is most likely shot . get a new mw or have a qualifide appliance man replace the magnetron

Posted on May 20, 2011

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1. Check power supply
2. Check male plug for possible damage
3. Check thermal fuse for possible damage
4. If magnetron is damaged, replace the unit

Posted on May 20, 2011

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Posted on Jan 02, 2017

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Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

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'';

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I have a LG Solar dom (Microwave oven). I have clean its inside 2 days ago as usual with some detergent and a wipe. Now the microwave is working . but as soon as I want to use the convenient oven it causes...


The oven has a heating resistance powering it. This heating resistance is fixed in the walls of the oven with some insulating bushes.
If, during the wash, some water has seeped in there because the bushes have aged and no longer sealing properly then the detergent in the water has acted like a short and the resulting flame has completely fried the bushing . This has now made the resistance to lose all the insulation and it's now shorting directly into the walls - such a big short is tripping even the greatest breaker in your house , the main one.
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My 6 burner smeg oven wont heat up, the fan goes and the grill works but not the oven


If there is no heating please do not switch on unless you have confirmed the fault. It is possible that the Magnetron is faulty, the temperature cut off is faulty or the main capacitor is short. It is also quite possible that insect can get into the oven and create soft spots. When you switch on these will create a short and make the voltage jump and in the long run damage the magnetron.
So Remove cover after disconnecting , check for dirt/moisture in the cabin, if so wipe clean and dry, check the magnetron and area clean and use an jet air to clean off.
Make sure that the program controller is working if not check power - step down supply, the pads are responding- if not faulty pads- or the door switches, if contact is not through the microwave will not work.

Now keeping clear of the microwave, switch on, use a cup of water inside to test.
If you notice any sparks shut off as the magnetron or the main HT capacitor can be faulty. replace with same type.
If there is heating without any issues, you can use the microwave safely

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1 Answer

Does not heat


is there light in it... if its completely dead..if yes, check main fuse inside and then check lamp also...
if it is getting on but not heating then u need to check the magnatron...the source that cause heating..

goodluck......

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The main controller board, or one of the power supplies has failed and require to be replaced.

You should take the microwave oven in for an estimate. I strongly suggest to not service this type of appliance yourself unless you are trained and experienced in microwave oven service.

There are many safety issues when servicing microwave ovens.

Jerry G.

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This microwave seems to have been haphazarly been recommended by Consumer Reports, but it is terribly unreliable. The turntables break when popping popcorn, the main fuse repeatedly blows, and they also stop heating.

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2 Answers

Poor heating performance


I complement you on an exemplary report!
The drooping line voltage seems a little more than desired and you might want to try it on a different outlet, but doubtful the real problem. Microwave ovens are about the heavyist load that standard house wiring sees.
More likely the magnatron is just going bad especially if the fan hasn't been working and it has been running hot.
By the way, how old is it?
They are not too hard to replace yourself. Look on EBAY for "universal magnatron"
Hope Ya Fix it!

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