Question about Frigidaire FMT144G1 Microwave Oven

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Kenmore over oven microwave

Everything was working fine, tried to heat food in afternoon, unit sound changed to buzz sound everything else works but it will not heat food.

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6 Suggested Answers

SOURCE: Frigidaire FMV156D 950 Watts Microwave

check or replace magnetron

Posted on Nov 09, 2008

  • 38 Answers

SOURCE: Frigidaire Professional series microwave won't heat

The most likely problem is the magnetron. Check your warranty in owners manual, I believe you have five year warranty on magnetron.

Posted on Mar 15, 2009

  • 19396 Answers

SOURCE: everything runs but food does not heat up

est the high voltage capacitor,the rectifier diode.or the magnetron. If all this are fine, test the control board.

Thediode and capacitors can br tested. The capacitor must bealloweddischarge before testing, or you risk to get electrocuted, evenifpower is off. Capacitors can get discharged by shorting theirtwocontacts.
Before replacing the magnetron test also the control board.
Replace the magnetron if the checks and all of the high voltage component tests are good, but the unit still does not heat.

All locations, and description of this parts can be located using the diagram here: Counter top.

Parts must be tested to find out what is wrong.

Remember that microwaves are potentially dangerous devices if not repaired properly, the job must be done by a competent person.
A microwave energy leakage test must always be performed when the oven is serviced for any reason.

Regarding parts, contact the seller here to purchase parts.

Posted on Apr 27, 2009

  • 6784 Answers

SOURCE: My microwave oven is not heating the food

HI, you will need to replace the heating device. This device is called the Magnetron and, it will cost you about $133.00. This is a repairable issue but, you will need to call for service. I do not recommend installing this device if you are not familiar with handling this type of tech.

Posted on Jun 01, 2009

  • 3 Answers

SOURCE: Food won't heat up

Hello, I had the same problem, and just fixed mine. Start by turning on your microwave (on mine, the light turned on and timer worked, but the fan nor the plate turned)... push the door upward and see if the microwave turns on... (mine did). so far so good. open the door and take the upper hinge cap off with flat head screwdrive. take the door off and place a small washer on the bottom hinge, put the door back on. your microwave should be good now. essentially, the door just needs to be pushed up a bit so it will work.
good luck, hope that works for you...

Posted on Jun 01, 2010

  • 130 Answers

SOURCE: Less than 5 years old

That pop was the magnetron frying. This is a repairable problem, but feirly expensive, around $300 if you have it done by a professional.

Please rate my response if it was helpful to you.

Thanks, Repairman45.

Posted on Dec 02, 2010

Testimonial: "Quick and accurate! Will go ahead and replace the entire unit. Thanks REPAIRMAN45!"

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Kenmore Over the Range Microwave making buzzing sound and not heating

This is a strong indicator the magnetron is fried, also! this is the most expensive part to replace in the microwave oven, and in most cases cheaper to replace the whole unit.

Jul 18, 2012 | Microwave Ovens

1 Answer

Kenmore model number 721.80593400 everything works but will not heat food it also sounds louder. I just replaced the magnetron and that did not help any ideas.


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

Microwave Oven Troubleshooting Tips


Jan 04, 2011 | Kenmore 80012 Microwave Oven

1 Answer

Everything works but it doesn't heat up the food. What could it be?

The part that generates microwaves that heat the food is the magnetron. Typically when the magnetron fails, it shorts out. When that happens the oven will produce a loud buzzing or humming sound. It typically not worth the cost to replace the magnetron, because it is almost as much as buying a new oven.

Jul 01, 2010 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Microwave won't turn on

When you say that the microwave won't turn on, can I assume that you mean that the food does not heat up! If that is the case, the problem lies with the magnetron circuit. This circuit consists of the transformer, rectifier and the magnetron, the part that generates the microwaves to heat the food. If it is the magenetron, then it probally not worth fixing since the cost to purchase the magnetron is almost as much as a new oven. To diagnose if it is the magnetron that has failed, when you turn on the oven, do you hear a louder that normal hum or buzzing sound? If that is the case, then it means that the magnetron is shorted and needs to be replaced.

Hope this helps.

Jun 18, 2010 | Sharp R-1502 Microwave Oven

1 Answer

Can't heat food

So we can help you, please post a NEW question, and please include your brand name and the full model number from the tag in or on the unit, as well as the answers to these questions:

When you try to microwave are the inside light, internal cooling fan and turntable all working?

Is there any unusual noise or is it louder or quieter than normal?

A loud buzz, hum, or groan is usually a shorted high voltage rectifier diode, but a sound like gurgling into an empty coffee mug is one symptom of a failed magnetron, and yet the mag can be bad without that sound.

We have a sound clip of what a microwave should sound like when the cooling fan and high voltage section are working.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Oct 11, 2009 | Goldstar Microwave Ovens

2 Answers

Does everything but heat food.

Sounds like the magnatron tube or it's fuse.

Aug 11, 2009 | Kenmore 80809 Microwave Oven

1 Answer

Once I place food in to get re-heated, I noticed that my microwave did not heat the food, even though everything else worked...can you help

time for a new one. the microwave unit is dead, no the oven. the microwave unit is the heart of the oven. so, if that goes, everything else goes.

Apr 07, 2009 | Maytag MMV4205 Microwave Oven

1 Answer

Everything works except the cooking part/no heating/turntable not turning, help!

you may have gotten a power surge and that can cause some funny things to happen, 1st is there power to the oven, 2nd if so there may be an internal fuse protector built in to the oven, check with the manual for anything of that sort listed. if not you may have to take it in and have it repaired by a pro. there is a lot of voltage in these ovens and unless you know what you are doing a person could get hurt

Jan 03, 2009 | Whirlpool GH4155XP Microwave Oven

1 Answer

Microwave does not heat/cook


power spikes are very damaging to a microwaves internal parts, it sounds like your transformer and/or magnetron are blown. if the unit is out of warranty I would recommend calling a repairman or getting a new microwave (the transformer & magnetron are expensive and dangerous to work on) also get a small single plug surge protector for the new one.

Mar 21, 2008 | Microwave Ovens

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