Question about Panasonic NN-T993SF Microwave Oven

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Door shut off malfunction

Panasonic NN-T993SF 1350 WattsThe turntable and fan (NOT the magnetron) run when I open the door. I think the door interlock is sticking, if I probe the lower interlock I can get it to stop, but the next time I close and open the door the turntable and fan start up again. Otherwise, it works as normal when the door is closed.

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  • Anonymous Sep 21, 2008

    Same Problem, Does anybody have an idea on how to solve?

  • swaite Sep 27, 2008

    THe same problem with my T993 just started 2 days ago.

  • Anonymous Mar 27, 2014

    When closing the door it does not click shut tightly to start the microwave.

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I have a similar problem. The only answer I got said I might have a falty switch, to witch I replied the the problem was logic and not necessarely mechanic. If you get deeper insight let me know please!

Posted on Nov 18, 2015

I have the same problem starting yesterday April 19. Have you gotten any answers.

Posted on Apr 20, 2008

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Posted on Jan 02, 2017

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1 Answer

Hello, I have a Panasonic MMT573SBBPQ microwave oven. 1. The turntable table stopped working. 2 Tested motor all OK 3. Noticed bulb had blown - replaced this (as was on same circuit as motor) 4. result :...


Check the door switch and once the door is shut the board must be active. If there is no clock or display then the processor board is faulty. Also if there is no action from the touch pad then it must be checked. Since the turntable works as you start the processor seems to work but the output to the magnetron is not active. So you need to check the relay to the magnetron switching, check the temperature cut off unit and the main capacitor.
All the above seems to be suspected.
Attempt with care/caution as there is high voltage present.

Aug 09, 2011 | Panasonic NN-H764 Microwave Oven

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Panasonic Invertr NN-S963, no heat and shuts off approx 7 sec. before end time. Fan works. Is it magnetron? If so, approx. how much to fix?


Magnatron failure is rare. I suggest you check your door interlock safety switch. Do you regularly open the door while the machine is running? I did and I found out that the micro switches (door safety swwitch) are just not up to that kind of abuse. Your maching thinks the door is open because the contacts are burned to the point they do not close.

Unplug the machine, DO NOT TOUCH THE SILVER CAN! You will find the switches opposite the hinge. Check them with a volt ohm meter on contunity setting.

You cam probably get replacement switches at a electronics parts place.

There are other things that can be wrong but you should check these switches first. Cost should be less than $10.00 if you do it.

Let me know if this works for you.

a

Sep 21, 2009 | Panasonic NN-S963BF Microwave Oven

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Microwave wont start but timer counts 3 secs and shuts off


Check the door latch mechanism the black nylon door catch may be broken.

Jun 19, 2009 | Panasonic NN-T993SF Microwave Oven

1 Answer

Panasonic - NN-T993SF 1350 watts microwave


Sorry this is something you wont fix at home I couldent even do this one.This is a nice unit depending on the cost this one I think is worth the repair bill , Good luck DFD please rate me TK U

Apr 12, 2009 | Panasonic NN-T993SF Microwave Oven

1 Answer

T993 - Positive Lock Switch ?


This is usually caused by either a bad door switch, a loose door switch mount (which are pretty simple problems to fix) or occasionally a problem on the control panel.

Even though a door switch clicks, it may still be bad inside. Its continuity must be checked.

Door switch or mount trouble can be caused by slamming the door or by opening the door while it's cooking without hitting the Stop pad first.

There are plastic mounts inside the microwave which hold the door switches and onto which the door latches lock when you close the door.

The screws on these mounts may be loose. If they get too loose, the switches will not be activated properly.

Sometimes it's a broken tab on the switch holder, allowing the switch to rotate just out of position. This tab can be hard to see, since it is under the bottom edge of the switch.

One test that sometimes helps is to gently lift up (and/or push down) on the door or handle as you try to start it. If it works or tries to work, then it's a door switch mount or door alignment issue.

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

You can find an authorized Panasonic servicer here. You can order Panasonic parts here.

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

Sep 27, 2008 | Panasonic NN-T993SF Microwave Oven

1 Answer

Nn t993sf


Sounds like the door switches are out of adjustment or broken.
I would take it to a shop for repair. Microwaves are almost always repaired affordably unless it is really old.
Hope ya fix it!

Feb 07, 2008 | Panasonic NN-T993SF Microwave Oven

1 Answer

Panasonic Microwave Turn table rotates when door is open


Found this Panasonic post in the Samsung section!

If it moves just a tiny bit when the door opens and then stops, that's normal.

If it keeps running when the door is open, that's usually due to a bad door switch or broken / loose door switch mount.

If you or a friend decide to look into it, we have critical safety information, info on door switch diagnosis and replacement, and
disassembly information at our site, linked here on Fixya: http://tinyurl.com/yzjozk

Any Panasonic parts not available locally can be had here: http://www.pasc.panasonic.com/epartr

We appreciate your thoughtful rating of our answer.

Nov 03, 2007 | Samsung SMH7159 Microwave Oven

2 Answers

MW stops after 23 seconds.


PLESE CHECK RELAYS ON PCBOARD .ALSO TRY DISCONNECTING ALL CONNECTIONS TO FRONT PANEL LEAVE IT DISCONNECTED 5MIN THEN RECONNECT AND TRY THE ELECTRONICS SHOULD RESET .HOPE I HELPED BIT OF A WEIRD FAULT

May 09, 2007 | Panasonic NN-S553 1350 Watts Microwave...

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