Question about Panasonic NN-T990SA Microwave Oven
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Posted on Jan 02, 2017
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
Posted on Nov 08, 2008
If it went dead almost
immediately after pressing the Start pad, that's usually a shorted
If it went dead a few seconds after pressing the Start pad, that's usually a failing high-voltage transformer. But this is likely an inverter model, so it wouldn't have one and would be some other component in the inverter I'd say.
If it goes dead or blows the breaker (or GFI) when you plug it in or open or close the door, then there's a problem with a door switch or door switch mount.
If you or someone you know decide to look into it, we have critical safety information and disassembly information at our site, and our link is at our listing here on FixYa.
Here are some links you or someone you know can use (in order given) for test help, but read the safety warnings first:
The best place to order Sharp parts is Tritronics. Or you can call them toll-free at 866-779-5835.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
Posted on Dec 26, 2008
This happens because of a bad door switch . The plastic mounts inside the microwave which hold the door switches and onto which the door latches lock when you close the door .
best regards .
please don't forget to rate !
Posted on Apr 04, 2010
Testimonial: "Thnaks; If this is my problem, how is this switch replaced, is it a proffesional job , or simple? Thank you kind sir.T.K. firstname.lastname@example.org"
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