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Why would heating on a GE spacemaker Microwave quit when all other items such as fans, turntable, timer, clock, etc. are OK??

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Hi, sorry, this same thing happened to my wife's microwave a few months ago with my 4 year old Spacemaker. It was the magnatron? - the part that generates the heat and makes it a microwave. Every other thing like the turntable, timer, fan, e.t.c works just like your own....

If everything works, but the microwave oven does not heat, this is commonly caused by a failed magnetron. The magnetron is essentially, the heart of the oven that produces the RF energy that is used to heat your food.

1. You will need to uninstall the oven from over the range in order to replace the part (you will need to do this anyway, if you decide to buy a replacement oven).
2. You will need to ensure the oven is UNPLUGGED before servicing anything inside the cabinet. You will need to remove the exterior case in order to access the magnetron. There are several websites that you can use that illustrate how the oven is assembled:
searspartsdirect, pcappliancerepair, appliancepartspros.
If you've never repaired an appliance on your own before, a microwave oven is usually not a recommended appliance to start with. Some models can be rather involved in taking apart.
3, The magnetron replacement part number for the model you have listed is WB27X10305. The average cost is about $80. NOTE: I found the part listed for the best price at appliancepartspros at a cost of $76. This model also has a thermostat (bi-metal) that if tripped, will also cause the oven not to heat. The thermostat acts as a fuse if the magnetron overheats. The part number is WB27X10788. You will need to remove the thermostat from the oven and take a resistance check across the component terminals to determine if it is good or not. A low resistance reading indicates a good thermostat. The average replacement cost is about $10.
Review the parts illustrations at the recommended websites to see if this is something that you may be able easily take apart and reassemble.
CAUTION: DO NOT operate a microwave oven with the exterior cover off. The voltage inside the High Voltage network where the magnetron is installed can exceed 3,000 volts.

Posted on Oct 02, 2010

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Everything works (clock, timer, inside light etc.) but not the fan, turntable and will not heat. It stopped while heating lasagne.


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

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Check to make sure the plastic on the shelve holders or tuntable guide did not wear and expose metal. If these holders or brackets are wore and exposed metal it shorted out your micro wave. They need to be replaced and a fuse needs to be replaced inside the control panel,

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Does the turntable rotate? If everything but this works (except no heat), you probably have a bad door switch. Here's a discussion of what's involved in replacing it: http://www.fixya.com/support/t267796-kenmore_microwave_hood_combination_over

If the turntable does rotate, I'd suspect a more significant failure, such as the transformer, capacitor, or magnetron. If it's any of these, it's time to replace the unit.

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Sounds like the problem is in the high voltage. Most common would be magnatron, capacitor and diode. For safety reasons this should be checked by a professional. Look in your owners manual because some high voltage parts have a longer warranty than 1 yr.

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