Question about Panasonic NN-S933BF Microwave Oven

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Our microwave turns on then shuts off after approximatly ten seconds. What can I do to fix this problem?

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  • Panasonic Master
  • 12,061 Answers

It seems that your unit has some sort of PSU fault, or a problem that is shutting down the Power Supply Unit, (PSU). Either this or the magnetron is failing. This "Shutdown" happens so that no further damage, and possible fire will occur.
You need to take the unit to a reputable service centre/man and ask for a firm "Quote" for the work to be done. It is that sound that gives it away, this is a typical switchmode Power Supply problem.

Posted on Feb 01, 2010

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Posted on Jan 02, 2017

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

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