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I have a emerson 8781 microwave, after two minutes of operation the unit shuts off. I dont recall hearing a fan noise. If i wait 5 minutes it can be run once again.

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It sounds like your cooling fan is not working and the magnetron is overheating and opening the thermostat.

It is vital that the cooling fan runs, or the magnetron will be destroyed.

For more help from Emerson visit here or get help using your appliance at 1-800-898-9020. Get help locating an authorized servicer or parts at 1-800-695-0098.

Emerson parts are distributed by Fox International and their number is 800-321-6993. Or you might try e-mailing researchdept@fox-international.com

Many Emerson microwave owner's manuals are available for free download here.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Posted on May 20, 2009

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I would bet that either your internal cooling fan is not running, or the magnetron is otherwise overheating.

We have a sound clip of what a microwave should sound like when the cooling fan and high voltage section are operating here.

It is vital that the cooling fan runs, or the magnetron will be destroyed.

Let me know if I can help you further.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

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