Question about Whirlpool Microwave Ovens

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My whirlpool Max microwave has stopped heating up the food. How can I fix it ?

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  • 134 Answers

Does the microwave turn on, the plate spins and it counts down time?

If so, and the only issue is that the microwave is not heating you are looking at a High Voltage transformer or a Magnetron. Either parts should only be installed by a service technician, and will cost you $100+ for the repair at most repair shops.

Posted on Apr 27, 2015

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Posted on Jan 02, 2017

MicrowaveSvc
  • 9047 Answers

SOURCE: Whirlpool Over the Range Microwave won't heat

Yes, I'm trying to help you. Sorry about all the questions, but it's part of diagnosis.

Generally, the most common causes of a failure to heat are:

- bad door switches or door switch mounts
- loose or corroded connection at the magnetron
- problem or loose connection on the control unit circuit board
- bad magnetron
- shorted high voltage diode

At this point, it seems pretty clear that the problem is in the high voltage section, most likely the magnetron, but possibly the high voltage diode or transformer..

Here are some links you or someone you know can use for test help to find the defective component, but read their safety warnings first:

http://www.gallawa.com/microtech/diode.html
http://www.gallawa.com/microtech/mag_test.html
http://www.gallawa.com/microtech/xformer.html

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

Posted on Aug 06, 2008

MicrowaveSvc
  • 9047 Answers

SOURCE: LG LMVM1935SB Microwave won't heat anymore!

With these symptoms, I would suspect you have a bad magnetron.

If it's within the magnetron portion of the warranty (usually 5-9 years) but out of the original full warranty (usually 1 year), then your manufacturer will cover the part cost, but not the cost to visit you or the labor charge to do the work.

Some manufacturers will send you the magnetron to do it yourself. If nothing else, you can save about $75 by taking it to the shop yourself.

Here are some links you or someone you know can use (in order given) for test help, but read the safety warnings first:

http://www.gallawa.com/microtech/diode.html (if it is NOT shorted, it's probably fine)
http://www.gallawa.com/microtech/mag_test.html (continuity can be good even though it is bad!)
http://www.gallawa.com/microtech/xformer.html

To order Goldstar / L.G. parts, visit Vance Baldwin Electronics.

For more Goldstar / LG / L.G. help, call 1-800-243-0000 (M-F, 7am-8pm CT, Sat 8-5 CT) and choose the appropriate prompt from the menu or
visit here. You can get warranty info & find a local authorized servicer.

L.G. / Goldstar owner's manuals can be downloaded here.

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

Posted on Nov 25, 2008

  • 38 Answers

SOURCE: My Frigidaire over the stove microwave not heating food

Hi,It is most likely the magnetron and diode that has to be replaced. This job should be done by a tech, High voltage. Magnetron's normally have a five year warranty, check your owners manual.

Posted on Mar 20, 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

heatman101
  • 43501 Answers

SOURCE: My GE Profile microwave just stopped heating

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

Microwave Oven Basic Troubleshooting Tips

heatman101

45xs

Posted on Sep 30, 2010

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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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Whirlpool model number MH7140XFB no longer heats


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The magnetron (the part that heats the food) may be bad or the circuitry to the magnetron may have burned out. Basically my advice is that if you have no electrical expertise, it isn't worth fixing. The magnetron if bad, costs almost as much as a new microwave. If you open it up (make sure it has been unplugged for a few hours and don't seen any obvious burnt parts, then most likely the magnetron is done and a new microwave is the way to go.

Let me know how this works out for you.

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Whirlpool Microwave no longer heating


Sounds like the magnetron has failed. It is the magnetron that generates the microwaves that heat the food. If it or the circuit that powers it fails then it stops heating. There are some high voltage circuits that feed the magnetron and you can potentially get hurt if you don't know what you are doing. Would recommend you have it serviced by a professional if you want it fixed, otherwise look for a new one since the cost of repair can come close to the price of a new microwave oven.

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