Question about Samsung SMH7178STD Microwave Oven

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Everything else works except the heat!

Clock works, etc. But it will not heat up the food. Help!

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Does it make any buzzing noises

Posted on Apr 01, 2008

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Everything on the microwave works (e.g., turntable lights, controls, etc.) except it will not heat food, defrost food etc. It sounds like a magnatron. Any Ideas before I call a tech? Is there a online...


It does sound like the magnetron, but you need to check the high voltage capacitor and diode because they can be the problem. I don't know if there is a online manual.

Apr 10, 2011 | Microwave Ovens

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Everything works except for the heating. CLocks, lights etc.


There are a few parts that will cause this problem, the first! a high voltage diode "opens or shorts" the second! is the high voltage capacitor becomes defective, next the magnetron is a common failure "heats the food" the least less likely to fail is the high voltage transformer. The cost for parts and labor will be on the high side to rectify the situation.

Jan 25, 2011 | Microwave Ovens

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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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Microve turns on, but will not heat Model number is FMT148G1B2 Everything seems to work except there's no heat. Clock works, countdown timer, light, turntable, etc., just no heat.


Sounds like the magnetron has failed. This is the component that produces the microwaves that heats the food.

The cost of the magnetron is about 95% of the cost of a microwave oven. Most people don't, for this reason, replace the magnetron, they replace the whole oven which is probably what you will end up doing.

There is a possibility that the circuit that provides power to the magnetron is faulty and you need to take it apart, find the proper electrical leads and test them with a volt meter. To do this you have to remove it from its mounting and take it apart. It is a fairly lengthy process however.


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Apr 16, 2009 | Frigidaire FMT148G1 Microwave Oven

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Microwave is not heating food


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

Microwave Oven Basic Troubleshooting Tips

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Mar 25, 2009 | GE Spacemaker JVM1640SJ Microwave Oven

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MICROWAVE NOT HEATING


I have the same problem. Everything seems to work except it doesn't heat up food.
I remember last time when it was working. I pressed the start botton before I closed the door. So it didn't start automatically, and I pushed start and it worked(it still heat up the food), but it doesn't work now. Help Please!!!
I have a Whirlpool Gold GH5184XPQ.

Thanks in advance

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The Microwave stopped heating


Probably magnetron failure- needs to go back to the dealers, this is a major job, may be cheaper to replace the oven

Aug 17, 2007 | Samsung SMH7159 Microwave Oven

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Not heating food


While it's possible it could be a door switch or mount, it's most likely a bad magnetron or a bad connection at the magnetron or on the control board. If you or a friend decide to work on it, we have *critical* safety, disassembly, and troubleshooting info (as well as a text file which helps in diagnosing and repairing door switch problems) at our site, which is linked at our listing here on FixYa: http://tinyurl.com/yzjozk You can order parts for Samsung models here: http://www.samsungparts.com/search/search.asp

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