Well this sure stinks. For the last week the microwave has been making this high pitch squeeling noise for about ten seconds before it made its usual heating hum. The other morning it stopped making that noise and no hum anymore either. The fan runs, the turntable turns the timer times but it won't heat. Also the timer when set for one minute goes for exactly 22 seconds after starting and then the machine completely shuts down. Any thoughts would be appreciated.
This model uses an inverter to produce high voltage instead of a convential transformer system. 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. Some manufacturers do not encourage or assist technicians to repair microwave inverters. Most offer the inverter as a whole assembly. But sometimes that is actually 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 repair shops and ask then specifically about inverter repair and inverter replacement costs for your model number.
Nn-t990sa model microwaveoven when start the oven after 20 seconds come back to stop mode , i replace the magnetron also samea problem, what is problem...
It is the magnetron. to fix mine, it cost about $55 for labor plus $5 for shipping for a total of $60. the part was still covered under the 5yr warranty.
SOURCE: Panasonic Model No. NN-S933BF Microwave Oven
could it be that i didn't follow the manuel because i got it second hand or is it because something is wrong with it,and i have to get it fixed.
SOURCE: my microwave says "child" and won't play anymore
Not sure of the TT series models but for the NN series models the procedure is as follows:-
If "Child" is displayed in the display window, then the child safety lock is on.
To remove the child safey lock, press the "Stop/Reset" button 3 times in fairly short succession (less than 3 seconds). The time of day or just the Colon sign (:) is then displayed
If you later want to apply the Child safety lock, then, when the time of day (or colon sign) is displayed, press "Start" 3 times (again in short succession).
Hope this helps
Doug
SOURCE: Panasonic NN-T994SF Microwave Oven quits after 15 seconds
my microwave shuts off after a few seconds. is there a fuse that needs replacing?
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My microwave will run 3 seconds and automatically shot off. Does anyone have a solution for fix?
Light and timer continue to work, but the microwave no longer heats! HELP!
For a few times, it helped if I unplugged and replugged the unit: sometimes this process resulted in correct operation, but now it doesn't help at all. I have tried all the different functions, e.g., cook, defrost, melt, etc. No heat.
MAG WAS BAD ALSO
Well, here's my story: my Panasonic microwave [NN-S262BF, with inverter] recently failed. It would only run for 2 seconds, making a clicking sound, then shut off. Being a do-it-yourselfer, I searched online for my symptoms and suspected the magnetron. I bought a new one for only $40 at partstore.com, and replaced it.
After reassembly, it did indeed run for 2 minutes and boil 8 ounces of water -- success! Or so I thought... after I reinstalled it over the stove, it failed again with the same exact symptoms. Argh...
So, back to the internet and I even called a local repair shop. They convinced me the problem was the inverter, so I bought a new one for $162 at partstore.com. I just completed that surgery this evening, and now it runs for precisely 23 seconds and shuts off -- never clicking, never heating. Now I'm cursing and losing DIY points with the wife :(
So, my latest theory is that the bad inverter fried my magnetrons, but it'll cost me another $40 for a new one to find out. Does any one out there actually know anything about this stuff and can give me any advice? The unit is 5 year and 4 months old (just outside the 5-year magnetron warranty), and I had to replace the PC board a few years ago when it failed.
Thanks in advance!
yes, I have the same problem with mine.
i have the same problem please help
nn ct559 our microwave lamp stopped working so I obtained a replacement and fitted it. This seemed very straightforward but now the turntable turns when the microwave is not in use, but stops working vwhen we start the microwave. I know that this sounds really odd but I'm sure I didn't touch anything else when I fitted the lamp. Any ideas anyone?
I have a Samsung SMH1816S that will only turn off if unplugged. It did not give me an error code, but if I shut the door it runs, and heats water, even though the light is not on and the turntable is not going. I can use the control panel to set time, and then the light will turn on and the turntable will go, but once it beeps that it is ended, the microwave goes dark but keeps running and heating. The only thing that stops it is opening the door.
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