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Panasonic microwave model NN740BAW F

Microwave heats, turntable and light goes on, but microwave light and turntable work without any buttons are pushed

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  • 8,820 Answers

You probably have a shorted door switch or a shorted relay on the control circuit board.

If you or someone you know decide to look into it, we have critical safety information, info on door switch diagnosis and replacement, and disassembly information at our site, and our link is at our listing here on FixYa.

If you think the problem is on the control panel, we repair these nationwide by mail for $39.95 postpaid in most cases.

Feel free to contact me directly (and include your model number) for more information & help.

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

William E. Miller
prototech@usa.net
http://www.microwavedisplay.com

Posted on Sep 26, 2008

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1 Answer

My microwave turntable stopped turning but the microwave still heats up and works, otherwise.


You didn't say what model microwave you have, but most that I have seen have two separate circuits inside. One operates the magnetron (which makes the microwaves) and the other operates the other things like the turntable or the inside light etc.. It is quite possible that you have a problem in that second circuit. This allows the heating without the turning. To fix this type of problem, if indeed that is the case, requires some skillful trouble shooting inside the microwave which I don't recommend your try unless you are a skilled technician, because of dangerous voltages. Go ahead and post the brand and model number and I can be more specific as to what action to take.

Dec 24, 2015 | Microwave Ovens

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Why does my microwave turntable turn when I open the door?


We recommend you have the microwave evaluated by an authorized service center.

Authorized service centers can be located in the below link.

www.panasonic.com/repair

May 01, 2014 | Panasonic NN-H965WF - Microwave Oven...

2 Answers

Panasonic Microwave NN-S935BF turntable and light do not work. Microwave still works. Bulb and turntable motor okay. No power to light or turntable. Any ideas?


Your description seems to be confusing turntable and light do not work
Bulb and motor OK
No power to light or turntable

Which is it?

They could be separate incidents. The drive motor could be fused and the globe just blew its life away..

Aug 15, 2009 | Microwave Ovens

2 Answers

Microwave will not heat food. punch in heating time, press start and nothing happens


HI. your control board has failed. you will need to replace the control board asap if possible.

May 30, 2009 | Panasonic Microwave Ovens

1 Answer

Turntable wheel under glass tray broken


If the microwave comes with a roller ring to rotate the glass turntable then I would recommend that it needs to be used when the microwave is operating, as the turntable rotates the food so it can be heated evenly.

I would recommend checking with your local Panasonic repairer he may have access to a new roller or even a second hand one to tide you over.

Mar 20, 2009 | Panasonic Microwave Ovens

1 Answer

Microwave does not heat


Remove and replace the Magnatron bulb. Though It may cost more that the machine is worth.

Dec 28, 2008 | GE Spacemaker 1.7 Cu. Ft. Over-the-Range...

1 Answer

Will not heat


Hi,
Here is a tip that will help you to figure out what is wrong with yourMicrowave Oven....

Microwave Oven Basic Troubleshooting Tips

heatman101
yysrsj

Sep 02, 2008 | Panasonic NN-S962 Microwave Oven

1 Answer

Microwave oven does not heat anything. Clock, turntable, lights work. I turned the turntable off while the oven was cooking--heard a noise, now it doesn't heat anything.


Spacemaker XL 1400 worked for 7 years.Yesterday, no more heat. Also plastic door damaged.
will try Panasonic or something commercial

Jul 28, 2008 | GE Spacemaker JVM1640SJ Microwave Oven

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