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Scrape or fix? Panasonic inverter genius sensor 1250 watt

Symptom: above model stays on for 3 seconds, shuts off and emits bad smell like burning plastic. Has since been unplugged and tried at another outlet-same result. Is it D.O.A.?

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  • Anonymous Dec 14, 2007

    My Panasonic just started doing this also. It runs for 4 seconds and then shuts off. I wonder how many people are having this problem.

  • Anonymous Dec 24, 2007

    Mine just started doing the same thing 22 Dec

  • Anonymous Jan 16, 2008

    I had the exact same problem last month on my Over the Range Panasonic microwave purchased in 2003. First as burning plastic smell and the unit only operating at 1/2 power after that. Finally, a large booming noise at which point I was afraid to continue using it. The authorized Panasonic Repair facility in my area informed me that to cost to repair the inverter would be $155.00 (parts and labor). They said the magnetron also needs replaced but it would be covered under the 5 year magnetron warranty. By the way, the product cost $229.00 new in 2003. Is this worth repairing if the inverter is prone to failure again ? Should Panasonic be paying to repair these inverters ?

  • Anonymous Feb 13, 2008

    I set 5 minutes on the quick button, turned around to continue working and the microwave had stopped. Thought I didn't set the microwave so I did it again. Same thing happened again except this time I had a witness. My son tried to set it for a third time and again the microwave started but stopped within seconds except this time smoke started coming out the bottom of the unit.

  • Anonymous Feb 15, 2008

    My unit just started doing the same thing but at 5 seconds.

  • toastforyou Mar 02, 2008

    PANASONIC NN-T785 INVERTOR. Last night, smoke and shut off, from the interior, right side. Today, will turn on only for about three-four seconds. Sounds like the other postings. Bought in 2005, from Costco.

  • David Jul 08, 2008

    I think this unit (NN T785) is a bad unit--bad design or something. I have already had mine repaired 2x (both in the 1st year of warranty). First it was the turntable, then just before the warranty expired the burning smell, smoke, etc. When we took it in and the repairman called Panasonic for parts--there was actually a pre-set kit for this problem it happens so much. Now about a year later (and out of warranty) it won't power on. No burning smell, just tries for 2-3 seconds then nothing. I wouldn't waste any more money on a Panasonic microwave (inverter). I had an old unit that lastest for 10 years, so somehow they've lost quality.

  • Anonymous Aug 04, 2008

    same here. 2.2 cu ft panasonic inverter type turns on for few seconds when shuts off and bad electric burning smell. was going to buy new one as this was a couple 3 ysr old. liked it when it worked but now I don't thing i'll buy another one of these.


    Same thing, i have mine with a burning smell and not heating anymore.It just stopped after i heated some rice and some potatoes. Also the 3 final beeps stopped to work. The lcd panel still work as nothing is going on. That pissed me off because this microwave still look as new! Not sure to go again with Panasonic, i'm tired of these cheep things....I'll rater go for more expensive one with no asset but i think it's impossible to find in this **** world!

  • ritzu Mar 14, 2009

    Looks like is a common problem on this " high tech piece of junk". It runs for only 5 seconds and then shuts off. I'm lucky, no burning smell, no smok. Just the $ 500.00 ++ I spent on it 3 years ago are burnt out/gone. Is anything good I can do with it, or better scrap it. Thanks. Ritzu



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In most cases, this is a problem with the inverter but it may be a bad magnetron.

Due to the lethal voltages used and produced, I do not recommend that an inexperienced person work on these.

I would recommend that you contact your nearest Panasonic-authorized servicer. You can find one here:

We're happy to help and we appreciate your thoughtful rating of our answer.

Posted on Dec 07, 2007

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My door doesn't open on my Panasonic, The Genius Prestige Microwave. Help

Posted on Aug 31, 2010


Does anyone know how to change the time on these things?

Posted on Oct 26, 2008

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Clock is set by pushing "clock". entering time on number pad, and touching "clock" again. This should do it.

Posted on Jan 22, 2010

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If it stops after 7 seconds, it has a problem with the inverter.

If it stops at 16 seconds and is a sensor model, it probably has a defective humidity sensor.

If it stops after 22 seconds, that means the controller has detected a problem, usually a problem with the inverter, controller, magnetron, or a bad connection from one or the other.

Display codes H95, H97, H98 or H99 mean that there's a problem with your inverter, magnetron, or digital programming circuit.

That may be a loose connection in the wiring between the inverter, magnetron, and/or control board, or maybe one of those components has failed.

Due to the lethal voltages used and produced in inverters, I do not recommend that an inexperienced person work on these.

You can find an authorized Panasonic servicer here.

In Canada, you can find an authorized Panasonic servicer here.

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

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Shuts off after 23 seconds....

In most cases when the microwave stops @ 23 seconds it's the Magnetron which has failed, and is shorting to earth.

Either that or the magnetron isn't getting the right signal from the inverter board. It gives it 20 seconds to get the right signal or it shuts itself off.

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