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Microwave not heating, but otherwise appears OK.

Panasonic NN-ST656W microwave, 3 yrs old.
Worked fine until today.
Now appears to work fine, but does not heat (and does not beep at the end of the cooking time).
Power supply from the wall is OK. Manual hasn't helped. Does this sound like a particular part needs replacing?

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Sounds like the magnetronis bad

Posted on Nov 17, 2009

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Hi, I have a Panasonic Inverter microwave NN-Sn9688. It's less than a year old and when you press the START button H98 appears and it will not start. Everything else works, clock etc and reset/stop...


Hi Judith, I am Kelly

If this has a 1 year warranty it is time to make that call.

Otherwise see this link about H97 or H98 codes: http://www.applianceaid.com/micro_faultcodes.html#panasonic

There are a few things that can cause the problem, none of them cheap repairs. The Magnetron filament, Control board and Inverter are the top 3 other than a losse connection.

I tried running the Model number NN-SN9688 and it does not cross. See Panasonic link here: http://www2.panasonic.com/webapp/wcs/stores/servlet/PNAEndecaSearchCmd?N=779832097&Ne=&No=0&Nr=12001&Ns=&Ntk=SupportSearch&URL=vSupportSearch&cmTag=true&catalogId=11017&storeId=15001&cm_sp=SiteSearch-_-SupportSearch-_-SupportHome&Ntt=NN-SN9688&x=28&y=20

I did not go to Panasonic Global and try other countries. I just did a USA search.

Thanks for choosing FixYa.

Kelly

Sep 10, 2010 | Panasonic Microwave Ovens

1 Answer

My Panasonic nn-s262 microwave/fan keeps reseting every time I try to use the microwave. The fan works fine and the light worked fine until today, it now resets the microwave. What can it be?


internal short that can damage your control panel but do not try to fix it yourself its got 4000v !!! sorry :( your life worth more then this microwave.

Dec 30, 2009 | Panasonic NN-S262SF Microwave Oven

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Panasonic genious sensor inverter 1300w nn-t664sfx displays code "h98" & will not run - what's the problem?


Mine did this once and it was the magnetron. Once replaced, it worked fine. Repair is an option if it is still under warranty or someone will do it on the cheap. Otherwise, just get a new microwave, since this is the main part.

Oct 04, 2009 | Panasonic NN-S960WA Microwave Oven

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No Heat.


Hi dadedulitl,

When you say "putting out no heat", I take that to mean it's not heating the food up. When a microwave suddenly stops heating food, but still appears to run, it's usually a defective/dead magnetron. Prices for replacement/repair will vary, you will need to find out what that service costs in your locality before having enough information to decide on repair or replacement.

When my first microwave lost it's magnetron (~20 yrs ago), it was 5 years old at the time, and the cost of buying a new oven was only a little more than the repair - but I had the repair done anyhow. Since then, we've replaced the entire oven instead (twice). Newer one's may have more power/less energy wastage, etc.

If it's ~ 3 years old, do you have an extended warranty?
If so, you might be able to use that (check the terms of the EW). Most standard warranties are for 1-2 years max, so unless you bought the EW, you're probably back to deciding between repair and replacement.

If I can be of further assistance, or if you have questions about any of my response(s), please let me know before rating me.

If this solves the issue, please rate it accordingly. My goal is to earn a "FixYa" rating from everyone I help.

Thanks for using Fixya.com,

Jon

Feb 21, 2009 | Panasonic NN-P794SF Microwave Oven

1 Answer

Operators manual for NN-ST656W Panasonic


Your search is complicated by the fact that this is an Australian model.

Your manual and other documents related to this model can be downloaded from this page.

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

Aug 02, 2008 | Panasonic NN-T888S Convection/Microwave...

1 Answer

PANASONIC MICROWAVE OVEN MODEL# NN-L829BA SERIAL # AD913700879


It sounds like a probemI with the inverter.

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:

http://www2.panasonic.com/webapp/wcs/stores/servlet/vServiceLocator?storeId=15001

Oct 16, 2007 | Panasonic NN-T990SA Microwave Oven

1 Answer

Microwave shuts off after 3 seconds


Although your model number doesn't seem to show up, the NNS950-series units are powered by an high-voltage inverter. And yours has failed. While an inverter (switched-mode power supply) is more efficient from a power consumption standpoint, it is more complex, thus more statistically prone to fail. These should only be examined and worked on by someone who has the necessary technical qualifications. Seriously. Often the machine-soldered connections in a microwave inverter are too weak, so they eventually fail, especially if heat is high in the area. They sometimes fail catastrophically. When not catastrophically damaged, you may hear clicking or squealing and may smell an electrical odor, which is sometimes obscured by the cooling fan. Sometimes a whole new inverter is cheaper than the time and labor required to fix the old one. If a technician is willing and able to troubleshoot and repair the inverter to component level, it will may be expensive, but may be worth it, especially if he or she will resolder and reinforce connections as needed as part of a thorough repair. That could easily make your inverter beter than a new one! You might be able to get some verbal estimates if you call Panasonic-authorized appliance / microwave repair shops and ask then specifically about inverter component-level repair and simple inverter replacement costs for your exact model number.

Dec 26, 2006 | Panasonic NN-S950WA Microwave Oven

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