Question about Panasonic NN-T990SA Microwave Oven

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Panasonic microwave... You offered your suggestion as to what was the possible problem with my MW. It is about 5 yrs old, and has never been run MT. I was cooking baked potatoes when it quit. I there any way, or the best way to decide whether its the mag. or inverter that has gone bad?? Thank-you VERY much for your reply. This MW has been built-in to my cabinets. BTW..why do MW only have doors that hinge on the left side????

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  • Anonymous Mar 26, 2014

    I have got a whirlpool microoven mw 20sw model as a gift.I want to know whether its possible to bake a cake?pls rply...

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Without HV test equipment it is quite difficult to determine if it is the magnetron or inverter.

5 years is a little short for magnetron failure but it appears that this is about all you can expect these days from a magnetron - the best I have seen was 11 years. I have not seen an inverter failure as yet (although I am not a full time repair man). The main reason I suspect it is the magnetron is the short time period from start to stop - it is typical of magnetron failure in Panasonic microwaves.

As regards door hinge side, that is one of the great unknowns. I suspect it comes from most people being right handed but even refrigerators could be specified as right/left hand hinged originally and now can be changed by customers.

Posted on Nov 09, 2008

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