Question about Frigidaire FMT144G1 Microwave Oven

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I heard a loud pop and then my microwave could come on and function normally except that it would not heat up at all

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  • vernon johnson
    vernon johnson Apr 28, 2010

    thank you but i have checked the magnetron and it is good

  • vernon johnson
    vernon johnson Apr 28, 2010

    thank you it was the fuse. but the fuse is $89 soooo i decided to junk it. that was the perfect answer.

  • vernon johnson
    vernon johnson Apr 29, 2010

    daveslave thank you very much for your solution but it was someone else that pinpointed my problem.

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The microwave has a high voltage transformer that raises the 115V coming from your wall up to about 3000V that then powers a magnetron tube responsible for heating your food. If their is a short, this transformer will discharge making aloud pop and often fry anything it discharges into. Because this is more than enough to kill somebody, there is a fuse that will blow. As a result, while the fan and light are working and as a result your microwave appears to run normally, in actually it's just the fan and the light. Anything the would make heat is disabled and potentially damaged.

Two issues you would need to address this. First, the fuse will have to be replaced. Secondly, you will need to identify where your short is. Personally I recommend taking it to a certified repairman, or buying a new one.

i heard a loud pop and then my microwave could - db03cb6.gif

Posted on Apr 28, 2010

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If you heard a loud pop , the magnetron (the component that actually generates the microwavesi heard a loud pop and then my microwave could - 2_bing.gif) may be broken. This is not easily fixed; Good luck

Posted on Apr 27, 2010

  • dave taylor Apr 29, 2010

    did i answer your question or did someone else? I see its resolved

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1 Answer

Less than 5 years old - Microwave Panel lights up, turntable turns, fan works - everything works except it doesn't heat food. Heard a pop, and now it runs louder than before but doesn't heat. Any ideas?


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.

Dec 02, 2010 | Frigidaire PLMV169DC Microwave Oven

1 Answer

While running, heard a "snap"


This is probably a shorted high voltage rectifier diode. See this link:

http://www.gallawa.com/microtech/diode.html
(if it's not shorted or burned, it's probably okay)

We have the service manuals you need and have uploaded them here and here to help you.
You can find links to helpful exploded view diagrams and part ordering help here.
I recommend that you bookmark that link to your favorites.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

May 05, 2010 | Sharp R-1502 Microwave Oven

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Ge spacemaker xl 1800 - no heat


HI, the loud popping noise was the Magnetron tube. this is the main heating device. the noise filter is also damaged and, should be replaced as well.

In conclusion, replacing the Magnetron tube and noise filter will fix this unit.

Jun 16, 2009 | GE Spacemaker JVM1640SJ Microwave Oven

1 Answer

Loud pop and microwave doesn't heat anymore


I have a GE Profile Spacemaker model JVM3670WF001, purchased I think in 2003. Pop sound, no Heat. Light goes on, carousel goes around,
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Jun 03, 2009 | GE Profile Spacemaker Over-the-Range...

1 Answer

Microwave made loud popping sound and now does not heat.


Hey,
Try this
Probably a high voltage diode popped because contaminated grease eventually built up and made a path for a high voltsge arc to occur.. To confirm,take the outer cover off the microwave and discharge the high voltage capacitor by shorting its terminals. Then pull the plug off the magnetron side and place it near the magnetron socket. Now turn the microwave on and push the connector on the magnetron with a chopstick or a long insulated screwdriver. If no arc when you do this this confirms a bad diode.



please rate my suggestion..

Apr 13, 2009 | Kenmore 62702 Microwave Oven

1 Answer

Microwave made loud popping noise


The magnetron is bad. Probably cost about $50 or $60 for the part. Not too easy to replace, but it can be done.

Dec 13, 2007 | Whirlpool MH7130XE Microwave Oven

1 Answer

Will not heat


The loud pop was almost certainly the high voltage diode going bad. To find parts, I suggest you call the number on your owner's manual or check with the store where you bought it. Sunbeam may not make this part available, so be prepared. Maybe they have authorized servicers in your area. Ask them about that. Good luck.

Sep 21, 2007 | Sunbeam SMW777 Microwave Oven

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