Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

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Dorr will not shut down all the way

The door keeps popping back up after it closes all the way down . I think the garage floor has heaved a little because of winter . How do you adjust the closing

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  • Kevin Kodama
    Kevin Kodama May 11, 2010

    What make is your garage door opener?

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LOOK FOR THE TWO ADJUSTING SCREWA WITH A LITTLE PICUTE OF A DOOR OR THE WORDS UP DOWN.
TURN THE DOWN ADJUSTMENT ABOUT 1/4 TURN AND TEST - DON'T OVER ADJUST YOU WANT THE DOOR TO CLOSE SOLID ON THE FLOOR

HOPE THIS HELPS

Posted on May 29, 2010

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Liftmaster 1265 closes and then immediately opens garage door. Pulling chain release does not release chain. Only way to keep door closed is power shut-off; performing very rapid return when reaches...


There are two possibilities here. First is if the main light flashes 10 times when the door reverses it is a door sensor problem. Make sure the sensors are pointed at one another and the small light on each one is lit and not flickering. Tweak them a little. If you cannot get both lights to come on you have bad sensors.

Second is if the door is reversing when it hits the floor. This is a problem with the door traveling too far in the down direction. Locate the 'down limit' located on the side of the motor unit and turn it a bit in the opposite direction of the arrow printed on the cover. Some tweaking may be necessary.

To release the door with the rope - pull straight down and then pull the rope in the direction away from the door. This should lock the mechanism in the open position. To release this pull straight down and release.

Sep 15, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door will not stay down when closed


Sounds like the down limit is out of adjustment. Turn the Down limit switch opposite the direction of the arrow a quarter turn and try again. Repeat until the door stops before hitting the floor then fine tune to shut off at the floor.

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How can I udjust garage door so that will close all the way down to the floor? Sears 41A43157 ? It came with the house - previous owner had no instruction manual. It was installed in 1993. Otherwise works...


look for 2 plastic screws, should be white in color. the screw on the left adjusts the down travel. there should be arrows pointing to which way to increase the travel(i think turning left for down). if you only need a few inches to reach the floor you should be able to adjust. if its way off there may not be enough adjustment. 1 full turn will move will door a couple inches so adjust a little at a time or you may overshoot. good luck

Apr 06, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

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Garage doors have a setting that will do this. The door is traveling too far down and when it hits the floor, it thinks it is hitting something. There should be adustment knobs on the back of the unit to solve this. Good luck!

Nov 22, 2009 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

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If the garage door is hitting the floor and reversing to the open position you need to adjust the 'down limit' which is on the side of the motor unit. Turn it in the opposite direction of the arrow printed on the cover. A little tweaking should get it just right.

Aug 05, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door keeps running after it is shut


to tell you how to fix this is tricky your limit switch is not working, if it is a liftmaster, or sears craftsman take the cover down, if it is a older allistar it is a dog limit on the chain, if a genie check the cherry switch in back of operator behind cover.

Mar 23, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

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ADJUST THE DOWN LIMIT IT THINKS THERE IS AN OBSTRUCTION AND IS REVERSING LIKE IT SHOULD.

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Mar 15, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

After opening, my automatic garage door creeps back down a bit


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Mar 13, 2009 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

My garage door will not stay down when I try to close it.


IF THE DOOR CLOSES ALL THE WAY WHEN HOLDING DOWN THE WALL BUTTON AND REVERSES 6" FROM THE FLOOR WHEN NOT HOLDING THE BUTTON.
I WOULD GUESS THAT THE SAFETY EYES ARE MOUNTED ON THE TRACK.
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SOLUTION: YOU CAN USE THE CLAW END OF A HAMMER TO TAP THE TRACK OUT A LITTLE WIDER - TAP NEXT TO THE WALL ON THE BRACKET THAT HOLDS THE TRACK TO THE WALL. MOVE THEM ABOUT 1/4" EACH SIDE.

OR

YOU CAN MOUNT THE BRACKETS TO THE WALL OR THE FLOOR.

THIS SHOULD SOLVE IT

HAVE A GREAT DAY

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Automatic Garage door reverses and automatically opens after closing


I can't believe it! My opener works fine a 10 degrees and above but below 10 degrees it would go down a little ways stop and go back with the light flashing. I checked the electric eye and found it would go out of alignment when the temp drop. Who knew!
I made the adjustment and it now works fine.

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