Question about LG Microwave Ovens
Posted by Anonymous on
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Posted on Jan 02, 2017
SOURCE: Doesn't heat food or liquid.
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.
Posted on Apr 26, 2009
Chances are it's a defective high voltage rectifier diode or magnetron.
There should be a "mini-manual" (tech sheet) hidden inside the unit behind the control panel or hidden on the left side behind the grille, which is very helpful when troubleshooting, testing, and locating components.
At our Web site, we have a video available showing how to remove a typical over the range control panel assembly in under 5 minutes.
Here are some links you or someone you know can use for test help, but read their safety warnings first:
(if it's not shorted or burned, it's probably okay)
You can find helpful exploded view diagrams and order parts by entering your full model number from the tag on the oven here.
You can download Frigidaire owner's manuals and installation instructions can be downloaded through the links here. where you can also locate a nearby authorized servicer if you choose.
The magnetron has a 10-year part warranty, but you would have to pay labor.
If nothing else, you can save about $75 by taking it to the shop yourself.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Jun 17, 2009
If your handy with getting the cover off and looking inside... check the obvious.
I suspect :
If both microwave and Heating elements dont work, then I will assume the magnetron is ok, ans we are dealing with a high voltage issue... and you will need at best... a volt meter and or neon troublelight...
moust appliances have a simple schematic inside... I would start with the heating element first... trace wiring back to circuit board... usually one side of the heating element is connected to the white wire (neutral) and live (Hot) side is controlled thru the circuit board... so finding the neutral should be easy... then trace with neon light or voltmeter...
I know easy for me to say... but with everything else working... it doesnt seem to be the microprocessor that controlls the unit...
Posted on May 06, 2010
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