Question about Panasonic NN-T774SF Microwave Oven

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I have a Panasonic microwave. It is Model NN-T774SF. It has an inverter. The latch on the door will not close. Is it worth the cost of repair?

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  • Panasonic Master
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This is usually a pretty simple fix.

The spring has probably become disconnected from the door latch head assembly or inner door panel.

If so, you can either order a replacement for the broken part, or install a small screw into the broken part, reinforce it with epoxy, and then reassemble everything.

Normally you have to separate the door panels (as shown in the attached photo) and then you'll see the parts involved.

I have a Panasonic microwave.  It is Model NN-T774 - 9f32bc4.jpg

Or you can watch a
YouTube video (not a video I made) that demonstrates how it's done.

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

Posted on Oct 26, 2012

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Help! I have a Panasonic model NN-T695. The door was stuck closed. A tiny part of the door lever was broken off.

I hired a repairman to fix it. He disassembed the microwave from the back panel to get accress to the door latch. He took out the dorr lever, and put in a small screw into the plastic door lever, to replace the bit of plastic that came off.

Now I have a NEW PROBLEM. He tried to re-assemble the microwave...Now when it's turned on, it shuts off after exactly 2 seconds. The microwave in inoperable now. What can the problem be?

Posted on Feb 22, 2013

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Posted on Jan 02, 2017

MicrowaveSvc
  • 9047 Answers

SOURCE: I have a Panasonic Inverter Model NN-T664.It acts

This is usually caused by either a bad door switch or a loose door switch mount, which are pretty simple problems to fix.

Even though a door switch clicks, it may still be bad inside.


Door switch or mount trouble is usually 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.

If the switch mount is broken, it's usually more economical and safer to add a dab or two of hot glue to the mount to secure the switch. Let it cool for about 30 minutes before using.

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 only need a switch, you can order a universal type here for $5 postpaid.

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

Posted on Oct 11, 2009

Testimonial: "THIS SOUNDS LIKE EXACTLY WHAT THE MICROWAVE IS DOING.. I BELIEVE NOW IT MAY BE WORTH REPAIRING. THANKS"

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Judging from the model and without looking it up I expect that unit has an inverter. If it is not the Switches and you have replaced the mag, the inverter is the power supply for the mag to work so either mag not getting power from inverter or inverter not getting signals from main PCB Timer board.

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Panasonic nnt774sf door will not remain closed. It appears the top plastic piece on the microwave itself (not on door)that the hooks latch on to is broken. Is there a way to fix this?


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Check to make sure one of the plastic hooks on the door was not broken off. If both door hook latches are functional then the most likely cause of your problem is one of the latch switches located behind the control panel. These switches will fail if the oven user opens the door frequently BEFORE the cook cycle ends. Always push STOP/RESET before opening any microwave oven door.

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I have a Panasonic Inverter Model NN-T664.It acts


This is usually caused by either a bad door switch or a loose door switch mount, which are pretty simple problems to fix.

Even though a door switch clicks, it may still be bad inside.


Door switch or mount trouble is usually 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.

If the switch mount is broken, it's usually more economical and safer to add a dab or two of hot glue to the mount to secure the switch. Let it cool for about 30 minutes before using.

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 only need a switch, you can order a universal type here for $5 postpaid.

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

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Door does not secure when closed


Hi , Either you have a faulty door interlock switch(es), or the door latches (on the door) have been damaged and will not activate the interlocks. either way, you have to be conversant with adjusting microwave latch assemblies once the repair has been effected AND THE USE OF AN OVEN LEAK DETECTOR IS IMPERATIVE for final testing or the end user will be subjected to harmful levels of microwave radiation.

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Door will not latch


The door switch mechanism is broken. Microwave doors have a special arraingement of double switches to ensure it is not open during cooking. Because everything is made from plastic nowadays, stuff like this breaks easily. The switches are commona nd cheap but the mounting parts may not be.

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Waveless, You're going to have to determine which side of the latch is the problem. Generally, you can do this with the mark 1 finger probe... See which half is 'sloppy' and get in there and tighten it. Note that if you are taking the door apart that you must replace everything as you found it...and don't mess with the hinges. Loose door seals can let microwaves escape. If anything looks like it needs adjustment: stop and call in a pro with the right tools.

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On for 2-3 seconds and shuts down with slight wire burning odor.


http://froogle.google.com is showing this model selling for as little as $100. But as a technician, I have never cared for the inverter models. As complexity increases...

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