Question about Panasonic Convection Microwave Oven with Inverter Technology NN-CD989S

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Panasonic nn c2003s inverter microwave

SERIAL NO 5B85240099 - MICROWAVE OVEN WORKS BUT NORMAL FAN FORCED DOESN'T. TOOK TO A REPAIRER INFEB. TOLD HE REQUIRED A CARD TO FIX IT. GAVE AUTHORITY TO DO THE JOB. PART STILL NOT ARRIVED AND TRADIE HAS SUGGESTED THAT THE BEST IDEA WOULD BE FOR ME TO SCRAP AS THE PART ALTHOUGH ON BACKORDER HE CAN NOT GET ANY EXPECTED DELIVERY TIME FROM THE COMPANY. THIS SEEMS WEIRD TO ME AS THIS MICROWAVE IS IN IMMACULATE CONDITION. I AM A FULL PENSIONER AND JUST DO NO HAVE THE FUNDS AVAILABLE TO PURCHASE ANEW ONE. ANY IDEAS. THANK YOU.

Posted by Anonymous on

6 Suggested Answers

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  • 2 Answers

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Posted on Jan 02, 2017

MicrowaveSvc
  • 9047 Answers

SOURCE: Panasonic Inverter Microvave (NN-T990SA) Does Not Operate at Full Power

In most cases, this is a problem with the inverter or 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:

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

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

Posted on Dec 17, 2007

MicrowaveSvc
  • 9047 Answers

SOURCE: Hello, I have Model No.

If the digital programmer circuit / controller does not get a feedback signal from the inverter for a period of 3 seconds, the controller will stop the cook cycle.

If it stops after 16 seconds,it may have a defective humidity sensor.

If it stops after 22 seconds, it probably has a bad magnetron or 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.

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

Posted on Jul 18, 2008

  • 1 Answer

SOURCE: Light stays on continuously in Panasonic microwave oven.

Problem solved by adjusted the door to close correctly.

Posted on Oct 21, 2009

SOURCE: panasonic NN-S740BA Microwave oven

In all likelihood the mangnetron is failed or failing, or perhaps even the Power Supply is faulty. You need to have it serviced by a reputable service centre/man.
Ensure you get a firm "Quote" before proceeding, and remember these days the cost of repair can equal or exceed the price of a new one

Posted on Jan 27, 2010

  • 1 Answer

SOURCE: panasonic NN-CD997S microwave

i have microwave problems power trip when switch on the unit. please help me.

Posted on May 29, 2010

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Try a reset by:
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I have a Panasonic NN-C2003S microwave/convection oven that won't heat anything under micropower mode and on countdown cuts out when it gets to 8 sec. It is working on the convection mode. Could someone...


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This is a job for a professional.

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If the screen is showing a fault number or a number you havent seen before then its probably a program fault which can't be fixed. Check that the vent holes on the back of the oven aren't dirty and ensure that the whole oven is clean inside. Sadly it sounds like a program fault which cant usually be fixed by the owner though.
Finding a Panasonic oven repairer in the UK shouldnt be a problem though. My parents had a simlar problem wth their Panasonic Inverter oven, called the UK customer services and Panasonic contacted an authorised repairer in Scotland to visit them. Call customer services on 0844 844 3868.
If the call out charge exceeds £80 then you're probably better off buying a new oven. 



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Panasonic Microwave NN-A770S getting hot on right side externally


If you described this to Panasonic very carefully, and they said it's normal, then I would say keep using it until such time that you get other symptoms. The inverter has some parts mounted on a large chunk of aluminum called a heat sink. It draws the heat out of the parts and the heat radiates and/or convects away. This keeps the circuit parts from overheating. As long as you have good air flow through the vents, it sounds okay.

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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.

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