Question about Amana RFS12MPS Microwave Oven

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I have replaced the magnatron but it still won't heat anything. Whats wrong?

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  • 1,711 Answers

You need to check also the diode and capacitor.

Just take care to either leave the oven for one hour unplug and then touch the capacitor or you connect the two wires end together with a jumper or a cable but take care not touching with bare hands. This because the capacitor holds 1500Volts for long after you switch it off. There is a chance to burn your hands that can stand for days nothing more don

Posted on Oct 06, 2010

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My singer microwave oven does not heat anything!


Hi fionalamplou ,

Plz specify the model no of the microwave to get proper answer however it Sounds like the magnatron has failed. This is the component that produces the microwaves that heats the food.

The cost of the magnatron is about 95% of the cost of a microwave oven. Most people don't, for this reason, replace the magnatron, they replace the whole oven.

There is a possiblity that the circuit that provides power to the magnatron is faulty and you need to take it apart, find the proper electrical leads and test them with a volt meter. To do this you have to remove it from its mounting and take it appart. It is a fairly lengthy process however.

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Sounds like the magnatron has failed. This is the component that produces the microwaves that heats the food.

The cost of the magnatron is about 95% of the cost of a microwave oven. Most people don't, for this reason, replace the magnatron, they replace the whole oven.

There is a possiblity that the circuit that provides power to the magnatron is faulty and you need to take it apart, find the proper electrical leads and test them with a volt meter. To do this you have to remove it from its mounting and take it appart. It is a fairly lengthy process however.

Jun 12, 2011 | Samsung SMH9187ST Microwave Oven

1 Answer

The microwave comes on and seems to cook but does not cook . It makes a very loud humming noise and the turntable goes around but there is no heat to cook anything.


you either have a bad magnatron, that is trying to heat but won't or you could have a capacitor or diode (rectifier) that is bad. if you order a magnatron replace capacitor and diode (rectifier)

Feb 24, 2011 | Kenmore Microwave Ovens

1 Answer

Food is not heated


two things could be wrong. One, There is an inline fuse that allows the current to flow to the magnatron. If this fuse is blown then the unit wont heat. Remove the outer cover and follow the cord into the unit and you should see the fuse. Make sure you replace this fuse with the same type. If the fuse doesnt work then the magnatron has gone out and cost for repair is about the cost of a new microwave

Dave

Mar 18, 2010 | Microwave Ovens

1 Answer

Everything works but won't heat


What you got was an oven with a bad MAGNATRON (this is whats the food!) I would return for replacment oven!...This is a common problem with these ovens!
I hope I was of big help to you!
Please rate this FREE solution!
Thank You!

Jan 17, 2009 | Microwave Ovens

2 Answers

I have a ge built in microwave model # JK90BM2BB but won't heat


This is a sure sign that the MAGNATRON has burnt out and needs replaced! (If the turntable works and the control panal is still working)! The MAGNATRON is what cooks the food)
Please rate my quick response!
THANK You!

Jan 16, 2009 | Kenmore 62622 Microwave Oven

1 Answer

Not heating


Either the magnatron or the high-voltage capacitor and diode. Replace the capacitor and diode then if still not working, replace the magnatron. Its only affordable if you do it yourself - buy the part on EBAY - lookup "universal magnatron"
Hope ya fix it!

Feb 06, 2008 | GE JVM1440 Microwave Oven

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Microwave


Magnatron is suspect. Need to put a voltmeter on the input (primary) side to the high-voltage transformer (big heavy iron thing in there) Should be getting 120Vac when it goes to cook cycle. Don't touch the other (high voltage) side of this transformer. If the power is there, you are looking at replacing the magnatron. Its affordable if you do it yourself - buy the part on EBAY - lookup "universal magnatron"

Jan 01, 2008 | Microwave Ovens

1 Answer

Won't heat. Everything else works.


Magnatron is suspect. Need to put a voltmeter on it and see if the input (primary) side to the high-voltage transformer (big heavy iron thing in there) is getting 120Vac. Don't touch the other (high voltage) side of this transformer. If the power is there, you are looking at replacing the magnatron. Its affordable if you do it yourself - buy the part on EBAY - lookup "universal magnatron"

Dec 31, 2007 | Hotpoint RVM1435 Microwave Oven

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