Repair and disassembly guides for GE Microwave ovens.

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What causes the stirrer fan to arc

When the microwave is started there are sparks in the top. So took out the stirrer fan and found some carbon on the fan blade and small area on the plastic shroud that had over heated.

Appears that the fan is not turning as the motor shaft can not be turned by hand.

If the fan is not turning is that the reason for the arcing?

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The carbon on the blade was probably absorbing the microwaves causing it to short out and heat up and melt the plastic. I'd replace the fan. A model number will help to get to the correct part.

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Jim will be eternally grateful.
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