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Does not heat food

When using the microwave, all functions are normal with the exception that the unit does not heat anything. the timer works, the table turns, it lights up and goes 'DING', but the food is as cold coming out as it was going in....

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One of the following has failed -

Magnetron
Transformer
Diode
Capacitor
Fuse (but these don't blow for no reason.).

These can be purchased and replaced, being careful to re-assemble all covers and housings exactly as disassembled. Same thing happened to my in-laws several years back.
You can find P/N's for each of the components listed above on the components themselves, or from an appliance website.
The only component that is testable is the transformer. Fuses can be replaced (see note above), but the diode and magnetron are not testable without special equipment. They are cheap enough anyway, when compared to the cost of replacing the whole unit.

But by all means, do not repair if you feel you cannot reassemble exactly as the unit came apart. Your dealing with invisible microwave radiation, and that can hurt you. An improperly reassembled unit is dangerous.

Posted on Jan 14, 2009

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Runs but does not heat the food.


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Nov 18, 2015 | Microwave Ovens

Tip

Error Code "d" - Microwave does not heat


The microwave could be in "Demo Mode" - Check your owners manual.

In Whirlpool/Kenmore models this is indicated by a lower case "d" on the right side of the display panel.

Most/All function except the magnatron (heat) work in demo mode so you can can learn to use the oven without actually cooking food

To clear "demo mode" press the "kitchen timer" pad and hold for 5 seconds until the "d" clears from the display... you may hear 2 beeps.

on Jun 16, 2009 | Kenmore 60654 Microwave Oven

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Only microwave not working


Chances are you have a bad secondary / cook relay on the control circuit board. The relay can be replaced. See details here.

Jul 06, 2013 | GE Advantium 120 Convection/Microwave Oven

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Not heating


Hello


Power Supply

Check whether there is a proper power supply. Look to see whether the cord is connected to a grounded 3-prong outlet and the cord is fully plugged in. If the electrical system is built-in and no power cord is visible, replace or reset the household fuse or circuit breaker.

Microwave Functions

Some basic microwave operational steps may affect whether the microwave is heating. Open and close the microwave door, as the unit will not function with the door open, and push "Stop/Clear" to cancel any previous settings, such as the timer, which do not heat the microwave oven.

Setting the Microwave

Once the power to the microwave has been reset, or verified as working, and the microwave is ready to run, select a new cook cycle and press "Start" to see if the microwave begins to run and cook food as expected. Allow the food to cook for the alloted time and then open the microwave door and check to see if the food has cooked or heated. Choose a longer cooking time and restart the microwave if food is heating but is cooking slowly.

Repair

If all efforts to troubleshoot the function and power to the microwave still do not get the appliance heating food as expected, there may be a repair issue that needs to be addressed. Contact professional technician for advice.

Oct 05, 2011 | Sanyo Microwave Ovens

1 Answer

My samsung microwave oven is not heating up food. It works normally, lights on, food turning on plate, but not heating the food.


if your microwave does everything you have described , and you can hear the cooling fan running as well after you press the start button , you probably have a faulty wave guide. The wave guide is also called a Magnetron Tube. It is the main part of the microwave which produces the microwave energy . If this part is not functioning it is best to replace the entire unit, rather than have it repaired .

Oct 03, 2010 | Samsung Microwave Ovens

1 Answer

The microwave turntable and timer seem to be functioning normally, but the food fails to heat.


this is likely to be the magnatron,,(spelling may be wrong) thats the part that heats the food up,,they can just go "pop!" and stop working,,,
there very pricy parts to buy and fit so to be honest you would be better off getting a new unit,

Aug 09, 2010 | GE JVM1440 Microwave Oven

1 Answer

Have GE JVM2050 over the range microwave, which stopped heating food and water since this morning. All other functions including light, key pad, clock, turntable work normal. The magnetron sound also


if everything works except the heating, it is most likely the mag tube is on its way out.........that is the most common reason for it not too cook.......since the microwave is a GE and it is 3.5 years old, i would say you are better off buying a new microwave, the mag tube starts at around $70.00 and up + the labor it costs too have a service person put it in........around another $60.00

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MICROWAVE IS NOT HEATING FOOD


I did more research along with the suggestion of an apprentice to have person to fix the microwave. I was unable to fix it myself. The microwave needs a magnetron .

Feb 03, 2009 | GE Spacemaker JVM1640SJ Microwave Oven

2 Answers

Everything works except heat


Sounds like you've had a failure in the microwave portion of the unit.

Microwave not heating problems when the timer/controller board appears to function properly, are related to the following components -

1) Diode
2) Capacitor
3) Transformer
4) Magnetron

Jan 24, 2009 | GE JE1540 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

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