RE: Panasonic NN-950BC/WC microwave
5-year-old unit. All functions appear normal. Can set time for "rice" etc. Quick minute works. Manual time set works. In all methods, the unit starts fine and runs for exactly 3 seconds and stops. It does make rather weird noises for that 3-second period. Unplugged and replugged. No other symptoms or problems until today.
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Re: 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.
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My unit shuts off after about 2 seconds. It seems like it tries to go, but it sounds like it stops working and then 1 or 2 more seconds run off and it shuts down. Then you hit start again and it lights up inside and then shuts down. It's only about 2 or 3 years old.Any solutions?
No sorry the issue will be with eiher the inverter, the magnetron or the main timer board. There is a tracer signal that comunicates through these components and if it doesnt get to where it is supposed to go it wil just shut off, the big hint at that is the time interval. It is not something like a sensor heating up and causing a fault. it is not running long enough to get any thing hot it is in the electroincs. Too expoensive to repair, im sorry better to get a new one. Good Luck
The magnatron is covered by warranty for 5 years and I just spoke with an authorized Panasonic repair center who said the inverter is covered on this unit depending on the manufacture date, like april 04 to october 05 approximately.