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Question about Panasonic NN-H264 Microwave Oven

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Complete but temporary death

My Panasonic over-the-counter microwave oven went completely dead this morning. It is under warranty so I went to the Panasonics website where I learned that this model does not exist. This being despite the fact that I had the operations manual in my, now grubby, little hands. I suspected a fuse, but why should I deal with it if it is under warranty? Since the website told me this model does not exist, I called the help line and was given a number of a TV repairman in Bakersfield who, they claimed, would do the work under warranty. I called; they won't. In fact they don't even work on microwave ovens at all. I called Panasonic again. After sufficient frustration communicating with a computer that apparently speaks English but doesn't understand any of it unless you scream, I reached Jane.... Hi Jane... I didn't mean to yell.... didn't know I was now talking to a human. After Jane learned that I had just called a few minutes earlier she asked for the service number that the first person should have given me. The first person hadn't. In fact, Jane could find no record of the call that I had made just minutes before. Jane gave me another phone number for a repair service that is about 120 miles from Bakersfield. It wasn't until after I hung up that I realized that the service number that Jane indicated I should have received at the first contact... she didn't give me either. I called this place 120 miles away. They don't answer their phone at normal hours. I didn't want to wait a couple of days for what is surely a fuse (no interior lights, no above oven lights, no fan, no panel illumination.... yes I checked the power supply with a plug-in nite light. So I turned to your website to find out where I might locate the fuse. Thank you. Now here's the weird thing (weirder than Panasonic not knowing they had this model). I tested the fuse with my OHM meter and found it to be dead before I removed it. After I had it removed, I checked it again with different results. I don't know what made me decide to check it again, but I now I will include this as an 'always do' in the future. I put it back into the microwave and it worked?!?!? Got any eplainations? Not for Panasonic not knowing they have this model (don't think anybody could explain that one), but for a fuse that apparently heals itself?

Posted by Harold Cornelius on

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  • Harold Cornelius Jan 25, 2007

    It wasn't anybody I talked with that told me the model didn't exist. It was their website that proclaimed this notion.

    You were right about it not lasting long. By the next morning it stopped again. The information I could find (including the removed fuse) indicates this oven requires an 18A fuse. Nobody seems to carry that. To be on the safe side I replaced the fuse with a 15A despite another site suggesting a 20A. I kept the old fuse just in case the problem continues. In that case I will put back the original and call for warranty work. No seals broken, just a little paint disturbed on the screws.

  • jujurrr Feb 27, 2008

    we have the same microwave oven and all of a sudden it died. no power, no nothing. i checked the outlet and it's working. now i feel that it is the fuse. unfortunately ours is out of warranty. how do you find the fuse to replace? thanks judy

  • Anonymous May 06, 2008

    I also have a NN-H264 which completely died during a period of non-use. This seems to suggest a fuse. Pulling the oven out and taking it to a repair shop is a hassle. Where is the fuse located? I would like to repair it myself or at least rule that our as the problem.





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First unplug the mic
-Take down the mic
-Remove the three screws holding the plastic exhaust grill (the grill that exhausts air in to house... located front and top)
-Remove the two screws that hold the keypad
-Grab hold of the keypad and push up, then pull out.
-With the keypad out of the way look inside the mic you should see the 18v cylindrical ceramic fuse.
-Remove fuse, set meter to ohms and there should be no reading if the fuse is open (open means blown) if there is a reading it isn't the fuse... ???
-Reinstall new fuse... a 120v - 20amp fuse will do if you can find the original 120v - 18amp.
Smiles :-)
Robin Koykka

Posted on Feb 20, 2010


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Suffixes matter, but apparently the folks you spoke to weren't smart enough to figure that one out. So your actual model number will be one of these: NNH264BF NNH264BFR NNH264QF NNH264SF NNH264SFR NNH264WF NNH264WFR Concerning the fuse, it is quite possible that it is intermittent inside and you shook it into proper alignment. If this is the case you can't count on it lasting too long. It may have been some corrosion or tarnish on the fuse or holder and you dislodged it. Sometimes a fuse holder will become loose. This will cause heat buildup which will melt the fuse internally. If you can rotate the fuse easily with your fingers while it's in the holder, it's too lose, and the fuse and holder both need to be replaced. If you just need a fuse, you should be able to find the appropriate 15A or 20A ceramic fuse at a local home center, hardware store, or applaince parts store. This model uses an inverter to produce the high voltage. Because of the potential high costs and lethal risks involved, I would not advise anyone without proper training and experience to attempt repairs. If you think you have anything other than a fuse, by all means try to get it fixed under warranty! If it IS under warranty, you have your sales receipt, and you haven't broken any seals and do not tell anyone (else) that you have been inside the unit, it would be covered under warranty. You should be able to locate a Panasonic-authorized servier here: Good luck.

Posted on Jan 25, 2007



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Still haven't answered the question: Where is the fuse located?
I have NN-H 264BF and have searched the "guts" and can't see
any fuse, or what looks like a fuse.

Posted on Dec 10, 2009

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