Question about Panasonic NN-T990SA Microwave Oven

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Door doesn't lock closed and cooking unable to proceed

The door won't lock on closing and the two hooks on the side of the door 'flop'
Apparently they are supposed to stay up, but just 'flop'

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  • JoAnn12 Jan 11, 2009

    The door latch broke off. We tried to regluse it but it will won't latch good enough for the microwave to cook. Will this be a costly item to fix? Are we better off buying a new Microwave?

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  • Panasonic Master
  • 9,098 Answers

The spring is off inside.

Normally the problem is not the spring itself, but a broken spring mounting tab on the door latch head (hook) assembly or the inner door panel.

door doesn't lock closed and cooking unable to pro - f0d6be4.jpg

If it's the door panel, it's usually easier and cheaper to use epoxy and some kind of hardware to fashion a new spring mount.

The door latch head (hook) is easy to replace or repair if that's the issue.

Normally you have to separate the door panels as shown in the attached photo to get to the innards.

Or you can watch a YouTube video (not a video I made) here 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.

99f1618.jpg


Posted on Dec 25, 2008

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1 Answer

Door will not stay shut


If you gently push up on the door latch heads (hook-like devices sticking out of the door) there should be spring tension. If they just flop right up, the spring is off inside.

Normally the problem is not the spring, but a broken spring mounting tab on the door latch head (hook) assembly or the inner door panel.

If it's the door panel, it's usually easier and cheaper to use epoxy and some kind of hardware to fashion a new spring mount.

The door latch head (hook) is easy to replace or repair if that's the issue.

You can download Whirlpool owner's manuals, installation manuals, and parts lists here.

You can find helpful exploded view diagrams and order parts by entering your full model number from the tag here.

Normally you have to separate the door panels (as shown in the attached photo) and then you'll see the screws you need to remove.
9f32bc4.jpg

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1 Answer

Door does not stay closed


If you gently push up on the door latch heads (hook-like devices sticking out of the door) there should be spring tension. If they just flop right up, the spring is off inside.

Normally the problem is not the spring, but a broken spring mounting tab on the door latch head (hook) assembly or the inner door panel.

If it's the door panel, it's usually easier and cheaper to use epoxy and some kind of hardware to fashion a new spring mount.

The door latch head (hook) is easy to replace or repair if that's the issue.

The service manual for the R-408LS (the model you posted it under) is here.

You can order parts from the Sears Parts Direct Web site.

Oct 26, 2013 | Sharp R408LS Stainless Steel 1100 Watts...

1 Answer

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Possible that the lock was broken and so the door opened. You can remove the front panel and check for broken plastic or nylon pieces which can be glued using instant adhesive.
Reset the lock and switch and the door must lock in correctly

Jan 21, 2013 | Microwave Ovens

1 Answer

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If it has the "double hook" type latch on the door,see if the hooks slide up and down.They should be spring loaded,if not,the spring attachment point inside the door may have broken off(my Sharp Carousel did this).I pryed the plastic door trim loose,and reattached the spring by using one of the slots inside to hold a metal wire clip(modified with needle-nose pliers) to hook the spring onto.Your door's design may be a little different,but a similar solution will probably be apparent after you get in there.

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1 Answer

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7_15_2012_12_13_20_pm.jpg

Jul 14, 2012 | Microwave Ovens

1 Answer

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That part likely will require the unit to be taken apart to replace it.

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1 Answer

Door won't remain closed and therefore won't operate. ? Problem with door locking mechanism


If you gently push up on the door latches (hook-like devices on the door) there should be spring tension. If they just flop right up, the spring is off.

Normally the problem is not the spring, but a broken spring mounting tab on the door latch head (hook) assembly or the inner door panel.

If it's the door panel, it's usually easier and cheaper to use epoxy and some kind of hardware to fashion a new spring mount.

The door latch head (hook) is easy to replace or repair if that's the issue.

The best place to order parts is Tritronics. You can also call them at 866-779-5835

We have critical safety & disassembly info at our site, linked here.

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

Or you can watch a YouTube video (not a video I made) here 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.

66646bc.jpg

Nov 21, 2008 | Panasonic Microwave Ovens

1 Answer

Door will not stay closed, panel reads "Refer to operating instructions before use"


If you gently push up on the door latches (hook-like devices on the door) there should be spring tension. If they just flop right up, the spring is off inside.

Normally the problem is a broken spring mounting tab on the door latch head (hook) assembly or the inner door panel.

If it's the door panel, it's usually easier and cheaper to use epoxy and some kind of hardware to fashion a new spring mount.

The door latch head (hook) is easy to replace or repair if that's the issue.

We have critical safety & disassembly info at our site, linked here: http://tinyurl.com/yzjozk

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

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

We're happy to help and we appreciate your thoughtful rating of our answer.

1d8403c.jpg

Jul 05, 2008 | Panasonic Microwave Ovens

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