Question about Jenn-Air JMC8100 Microwave Oven

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Hi I have jennair 8100 made loud humming nois and tripped fuse how do i check which has gone magnatron or transformer ? or could it be something else

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If it is humming it is the magnetron and likely not worth repairing unless it is covered by the mfg warr.

Posted on Oct 04, 2009

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Loud hum in my ge rc7200


More than likely the Magnetron is bad, causing the transformer to over heat. Or it could just be the transformer going bad. Either way not a good situation. Both are expensive.

Dec 13, 2014 | GE Microwave Ovens

1 Answer

Microwave makes a loud roaring sound when start is pressed to cook something. The turntable turns and lights go on, but sound is horendous. We quickly stop it fearing it might be melting down.


Most likely it is the magnatron has gone bad, this or the fan for the magnatron. If your handy you can dissasemble the unit and look for a damaged fan, if none found then the magnatron is most likely bad.

May 07, 2011 | Sharp R-308J Microwave Oven

1 Answer

Amana microwave M#rcs10mpsa that had a loud hum that sounds like it was coming from the transformer or capacitor and then it blows the two control fuses. i replaced the magnatron but it is doing the same...


you need a meter than has the ability to check capacitors. These meters are generally more expensive like 150 bucks and mostly sold for HVAC techs. You disconnect all wires to the cap and connect your test leads. The hum is usually the transformer getting ready to die. Just keep using it until so. The transformer will run you about 130 bucks I think.

Oct 14, 2010 | Amana RFS12MPS Microwave Oven

1 Answer

Magnatron suddenly making more noise. Much louder


Often over the years the Transformer laminations can loosen, from the on/off rising and collapsing magnetic fields, and then they sorta hum louder. I suspect this is what is going on. Shouldn't be too much of a worry.. keep an eye on it tho.

Jan 20, 2010 | GE JVM2070 Microwave Oven

1 Answer

Making loud buzzing sound & smells like wires burning.


That is the Magnatron or the Hi-Voltage transformer. If I could smell it I could tell the difference. The transformer will produce smoke more so than the Mag.
Eric

Dec 25, 2009 | Microwave Ovens

1 Answer

Jvm1533wd spacemaker wont heat up and has a loud humming noise


I have found that in nearly all cases, it can either be the high voltage fuse or the magnatron assy. The high voltage fuse can be found normally enclosed running from the high voltage capacitor to the transformer. Always make sure you read up on discharging high voltage capcitor , for it can store a dangerous amount of voltage and if not discharged can cause serious injury or death. Good luck.

Sep 26, 2009 | Microwave Ovens

2 Answers

Microwave popped and now does not heat


Okay, first we need to separate the situations. You were boiling water on the stove and had the range hood fan running to **** up the steam. Then you put something in the microwave to heat and you heard a pop and then zip-o.

The water on the stove has nothing to do with the situation, the fan you turn on is not part of the microwave, so it has nothing to do with the microwave.

The pop you heard and then the humming suggests the magnetron failed. You said you found a blow fuse and replaced it and still nothing, right? The magnetron is the most likely culprit...I would think it is safe to say that the magnetron shorted and drew enough current to blow the fuse.

Replace the magnetron and if that doesn't work, let me know here. Good Luck!

Sep 14, 2009 | Sharp R-1480 Microwave Oven

1 Answer

HI. I have a Whirlpool Microwave (MH6141XKB). It will not reheat the food and makes a louder "humming" sound than normal. Other than that, everything works fine. Please advise. Brent


Brent
The magnatron in your oven has gone out and will need replaced!( This is the device that heats up your food) If everything is working and your food is not getting hot 99.9 percent of the time its the Magnatron or its fuse! The loud humming is also a big clue the MAGNATRON has gone bad!
Please rate this response and help us keep this area free!
Thank You!

Jan 21, 2009 | Whirlpool MH6141XK Microwave Oven

1 Answer

Loud humming noise


If all of your door switches check out, replace the magnatron, capacitor, and diodes.

Oct 27, 2008 | KitchenAid KHMS145KSS Microwave Oven

2 Answers

Microwave makes loud noise and does not heat. Smell of light burning


The noise is coming from the high-voltage transformer being overloaded by something shorting it out. 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 | Whirlpool GH8155XJ Microwave Oven

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