Question about Microwave Ovens

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Heating problems must heat items extra long to warm up.

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Panasonic Microwave Model NN-S963/S763 not warming up,Everything elseis working, just no heat.What is the problem?

Posted on Dec 04, 2008

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This is usually due to a worn out or dying magnetron.

If you or someone you know decide to work on it, we have *critical* safety, disassembly, and troubleshooting info at our site, and our link is at our listing here on FixYa:

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

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

Posted on Mar 30, 2008


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Posted on Jan 02, 2017

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1 Answer

It's heating but not cooking food can it b fixed?

If you mean it's running, but not heating food, then the problem is most likely in the high voltage circuit, or whatever powers it (typically a relay). The most common item to fail is the high voltage rectifier. If it's more tha 7 years old, or has been used frequently to heat low water content items (popcorn), then a defective magnetron could also be the problem.

Jul 20, 2016 | Microwave Ovens

1 Answer

Heating problems Jenn-air microwave - jmv8000bds - it heats while unused for a while but to warm more than the first item is not working - what is broke?

First, check to make sure that the air vents are clear. Secondly, is the cooling fan running? If these are OK, (how old is this unit?) it's probably the magnetron is old and weak....... Put in a container with 2 quarts of cold water and run it for 10 minutes. It should boil water after about 4 or 5 minutes and keep boiling it for the remainder of the timer preset. If not, the magnetron is losing power.

Sep 20, 2013 | Jenn-Air JMC8130DD Microwave Oven

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Its not working properly ,not heating/warm items.

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

Microwave Oven Basic Troubleshooting Tips


Aug 30, 2011 | GE JVM1850 1000 Watts Microwave Oven

1 Answer

Microwave heating timer is running but the item is not heating

Dear basis,
your problem indicates,heating unit is faulty,so replace heat sensitivity controller.
Thank you for using Fixya

Dec 27, 2010 | Sanyo Microwave Ovens

1 Answer

The oven is not heating the food. All the controls is working, but it is not heating up the items. I tried to warm up a beverge and it didn't warm up. This just happened all of a sudden. Last night it...


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

Microwave Oven Troubleshooting Tips



Nov 11, 2010 | GE JVM1630 Microwave Oven

1 Answer

My microwave oven does not warm food

Presumably the machine runs but doesn't heat. This suggests that the magnetron has 'died'. If nothing is working the problem could be in a number of places, starting with the door switches. These are not a 'fixit yourself' item as they are dangerous to work on. Take it to a reputable service person.

Nov 22, 2009 | LG Microwave Ovens

2 Answers

Does not heat food but appliance cabinet gets very warm, some warpage of appliance liner.

One solution could be that the vents of the microwave need cleaning out.You can do this by just pulling out the blockage.
Then see if it will heat food.

Oct 19, 2009 | General Electric PVM1870DMWW 1100 Watts...

1 Answer

Microwave not heating up food

This model is a lower-end type that probably didn't cost very much. Since it's over 2 years old, you have no warranty left. Most appliance repair shops charge extra $$ for servicing installed items in the home. You'd probably be better off purchasing a new comparable model. The labor fee alone might equal what you paid for it.

Jan 08, 2009 | Magic Chef Microwave Ovens

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