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My panasonic dimension [inverter] microwave times out after 30 seconds; model NNA7, could you please tell me which part is in need of replacement. Only the microwave part of this unit is affected. Thank you Rex Toplis

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If it stops after 22 seconds, that means the controller has detected a problem, usually 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.

You can find an authorized Panasonic servicer here.

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

Posted on Sep 16, 2008

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1 Answer

Microwave cuts off after 30 seconds


We would need to know the brand and full model number to be sure, but since you posted in the Panasonic section, I'll assume it's a Panasonic.

Panasonics have preset times in which it will shut off if certain failures occur.

If it stops at 16 seconds and is a sensor model, it probably has a defective humidity sensor.

If it stops after 22 seconds, that means the controller has detected a problem, usually a problem with the inverter, controller, magnetron, or a bad connection from one or the other.

Due to the lethal voltages used and produced in inverters, I do not recommend that an inexperienced person work on these.

You can find an authorized Panasonic servicer here.

In Canada, you can find an authorized Panasonic servicer here.

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

Dec 12, 2011 | Panasonic Microwave Ovens

1 Answer

Microwave shutts off after 2 seconds/


See if this describes what's happening:
  • Put in time, push start and unit runs for 2 seconds, relay clicks, unit goes off. Cook time on display goes off and clock time comes back. Bad upper interlock switch and charred connector
If so, see
http://207.234.249.73/mwd/safety.txt
http://207.234.249.73/mwd/disassembly.txt
http://207.234.249.73/mwd/doorsw.txt


Otherwise, 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.

It may be a loose connection in the wiring between the inverter, magnetron, and/or control board, or maybe one of those components has failed.


Due to the lethal voltages used and produced in inverters, I do not recommend that an inexperienced person work on these.

You can find an authorized Panasonic servicer here.

In Canada, you can find an authorized Panasonic servicer here.

If yours is not a Panasonic, please reply back with your brand and model number so we can help you.

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

May 22, 2010 | Panasonic NN-S592 Microwave Oven

1 Answer

Microwave shuts down after 3 seconds


you need a new magnetron and inverter board, this is an expensive repair, unit can be replaced with panasonic parts or replaced with same size panasonic unit

Jul 17, 2009 | Thermador MBBS Microwave Oven

1 Answer

Microwave does not heat.


HI, this is an inverter board issue. the magnetron would not shut down the unit. if the magnetron was the issue, it would continue to run but, it would not heat.

replace the inverter asap.

Jun 17, 2009 | Panasonic Microwave Ovens

1 Answer

Operating instructions how to set the clock etc con my mircoware


hit clock button press in the time with the numbers on the pad and press the clock button time solved

Apr 03, 2009 | Panasonic NN-P794SF Microwave Oven

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Stopped heating, shuts off before time expires


My panasonic microwave model # NN-S540BFW stops after 4 seconds after you hit the start button and cuts off on its own. What is wrong with my microwave?

Jan 12, 2009 | Panasonic NN-S763BF Microwave Oven

1 Answer

Panasonic Microwave only works for 37 secs no matter what time setting


If it stops after 22 seconds, that means the controller has detected a problem, usually a problem with the inverter or a bad magnetron.

Due to the lethal voltages used and produced in inverters, I do not recommend that an inexperienced person work on these.

You can find an authorized Panasonic servicer here.

In Canada, you can find an authorized Panasonic servicer here.

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

Jan 04, 2009 | Microwave Ovens

1 Answer

Faulty Panasonic inverter dimension 4 combination microwave


If it stops after 22 seconds, that means the controller has detected a problem, usually 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.

You can find an authorized Panasonic servicer here.

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

Oct 20, 2008 | Microwave Ovens

1 Answer

Panasonic Inverter NN-V673S microwave- shuts off after 2-30 secs


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. 



Apr 19, 2008 | Microwave Ovens

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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