Question about GE JVM1542 Microwave Oven

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Not heating intermediately

Will not heat occasionally even though everything seems to be okay, could it be the magnetron going bad

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I had a microwave (Sharp) at one time that would not cook at random, I found that one of the door sensors was not actuating (the one that engages the magnetron) I replaced the sensor and it worked fine.

Using an ohm meter and check each of the door sensors to see if they all actuate

If you are not comfortable with checking such things, then take the microwave to a appliance repair shop to have them check it out.

Posted on Jun 09, 2008

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If you have plug-in type watt meter, you can check the power draw of the oven when it is heating and it isn't. The magnetron is the primary power consumer of the unit, and by comparing the difference of power you can tell if it is the magnetron. Most likely your intuition is correct.

Posted on Jun 09, 2008

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1 Answer

Does not heat-has a louder noise

most likely you have a bad magnetron on unit... if everything else is working just not heating the magnetron is bad and this is what heats the food... it is located behind the control panel /.....sometimes there is a thermal fuse on the magnetron that can go bad but if it is making a loud noise most likely it is trying to come on but has shorted out....good luck to you./

Jan 12, 2011 | Microwave Ovens

1 Answer

Runs but will not heat

The problem is that the magnetron is not working. Magnetron is the devices that sends the heat wave to the food.

If you're familiar with the components, you may open the microwave oven and check it. There's a possibility that some capacitors, resistors around the magnetron have gone bad. That is why the magnetron is not working.

But if everything looks okay, then you may want to check the magnetron itself. Unfortunately, I'm not sure about the tools that you need to check it.

You may need an assistance from a pro for this kind of problem.

Thank you and good luck!

Aug 02, 2010 | Microwave Ovens

1 Answer

Everything seems to work but no heating.

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.


Jul 19, 2010 | Samsung SMH7174BC Microwave Oven

2 Answers

My Maytag microwave stopped heating. Everything

Generally the magnetron (the part that heats the food) is the cause if everything else still works. Unfortunately replacing the magnetron is barely cheaper than buying a new microwave though you can check out to decide whether you want to attempt replacing the part.

Let me know how this works out for you.

May 24, 2010 | Maytag 2.0 Cu. Ft. Over-the-Range...

1 Answer

GE JVM1631BB not heating

If the measurements you got on the high voltage transformer match what is specified on the mini-manual, then the transformer is probably okay. If there is a serious difference, that may mean the high voltage is too high, which can destroy the high voltage rectifier diode. Otherwise, you have a bad magnetron, regardless of how well it ohms out. Even though the magnetron's continuity readings are good, the magnetron can still be bad. We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Jun 02, 2009 | GE JVM1631 Microwave Oven

1 Answer

Pan. microwave nns762bf has low/poor heat

Assuming the line voltage, turntable and stirrer are okay, low heat will be a bad magnetron.

Nov 06, 2008 | Microwave Ovens

1 Answer

Samsung MD800SC Microwave runs but stopped heating

Chances are you have a bad connection, maybe the cook relay or at the magnetron, but feel free to write back with details when it fails again.

Aug 19, 2008 | Samsung MD800SC Microwave Oven

1 Answer

Everything sounds like it is running but no heat. You can hear a hum, so it appearsthat the magnetron is working (not sure though). Would a fuse be blown, even though it sounds like everything is working...

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

- bad door switches or door switch mounts
- loose connection at the magnetron
- problem or loose connection on the control unit circuit board
- bad magnetron or other high voltage part (such as a shorted diode)

If you or someone you know decide to look into it, we have critical safety information, info on door switch diagnosis and replacement, and disassembly information at our site, and our link is at our listing here on FixYa:

You can usually find helpful exploded view diagrams and order parts by entering your full model number here:

In some models there is also a very helpful "mini-manual" hidden inside the unit behind the control panel.

We're happy to help and we appreciate your thoughtful rating of our answer.

Mar 16, 2008 | GE JVM1440 Microwave Oven

1 Answer

Everything works...Except for actually heating the food

It has a bad magnetron. This is the tube that provides the microwaves to heat the food. Not too easy to replace yourself but it can be done. Cost of magnetron is probably less than $50 or $60.

Dec 14, 2007 | Frigidaire PLMV168 Microwave Oven

1 Answer

Not heating

Assuming the door switches and mounts are okay, it would likely be a bad magnetron, or a bad connection at the magnetron or on the control board. See

May 01, 2007 | Samsung MW620 600 Watts Microwave Oven

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