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Microwave's Power goes off after 3 minutes running..

I have a real piece of junk microwave.. a Westinghouse 3501.. This was actually the second one i got, after returning the first one.. i wish i would've taken the time to return this one, also.. Anyway, after warming food at full power for 3 minutes, the power will completely shut off.. i open the door, i let it cool out in there, and about a minute later it turns back on again.. then i proceed to start warming my food again, and it usually shuts right off after about another minute.. this is driving me crazy.. it ends up taking the better half of an hour just to microwave 3 baked potatoes!!

Posted by Jarson Marlo on

  • 2 more comments 
  • Anonymous Nov 18, 2007

    I have a Westinghouse Microwave also, that has started to turn of after about 30 seconds, and the light flickers. It is only 2 years old. Can I fix it for less than buying a new one? Or is it still under warranty?

  • jetjockey Feb 05, 2009

    We have a Westinghouse Beyond (with barcode scanner) m/w that just caught fire on the inside. My son was heating a cupful of water and it seemed as if the m/waves were focused on the side of the unit, where a thin retainer (made of some wafer thin material) caught fire. Any ideas what that's all about?

  • bumac Feb 09, 2009

    my Panasonic micro wave goes in and out of power. When it shuts off I can restart it right away. But no guaranty it will keep working. When it stops it is usually under 2 min of operation.

  • Anonymous Mar 21, 2014

    Microwave shuts off after three minutes and doesn't come back on until minutes later



1 Answer

William Miller

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If the time from START to shut off were EXACTLY 3 minutes, then I would suspect a sensor problem or corrupted code in the microprocesor. But since that time sounds more random, it sounds heat-related, and I would suspect a failing magnetron or a failure in the cooling system. If the cooling fan is not running while the oven is cooking, this failure can occur, and can destroy the magnetron in short order. A cracked magnet (has the oven been dropped?) or other problem can cause a magnetron to go bad and overheat. If it's under warranty, I would definitely contact the manufacturer (see your manual) to find an authorized local servicer. If it's out of warranty, I would balance the cost of a new microwave versus a bench diagnosis fee of $25 or more or an in-shop repair cost of maybe $80 or more.

Posted on Oct 16, 2006


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