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

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My garage door goes up so far and comes right back down or if it goes up it gets stuck and won't come down. Can you help?

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  • Don Maggard May 11, 2010

    Do you have a garage door opener? If you release the opener from the door can you lift the door by hand with no problems? Does the opener run alright not connected to the door?


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Your door spring is most likely broken. It is just above the door.

Posted on May 12, 2009

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3/4 hp Craftsman garage door going back up when closing.what shiuld i do?

If it completely closes and then goes back up and the lights are NOT flashing adjust the down limits (its going down to far). If the lights flash repeatedly then something is tripping the safety sensors. Finally if its going almost all the way down and then comes back up adjust your down force.

Oct 30, 2016 | Building Materials

1 Answer

My l/m door goes down but come right back up help

This can be one of two problems ! First problem can be that their is something blocking the infrared sensors that would cause the door to go back to the up position but in most cases if their is something blocking one of the sensors the door should not even move and just make a click sound and you will see the lights flashing on the garage door opener , it can also be a mis aligned sensor not pointing directly at the recieving sensor or vice versa! Ok if that was,nt the issue then you can make shure that the door isn,t traveling further then where it needs to stop to be closed, sometimes the chain or belt depending on your opener loosens up and can add an extra inch of travel to the door causing it to return to the up position, to fix this you have 2 adjustments on your opener ...1 will be a pressure adjustment can turn the adjustment to midway #6 to add some pressure so that the opener does not sense the xtra travel of the door , You can also backoff on the downtravel adjustment a turn or two and that will make the door not come down as far ...This adjustment is used to set how far the door goes up and how far you want the door to come down, you will see a picture of the door on both of these adjustments with an arrow letting you know which way to turn the screw ..remember each full turn of the screw equals 1/4" inch of travel to the door just follow the direction of the arrow or turn the screw counter clockwise for less travel !,,,Hope this helps you Sincerely Glenn

Jun 13, 2014 | liftmaster Garage Door 1/2 Hp

1 Answer

Garage door

There should be two screw slots on the side/end of the lifter motor unit.
One is for how much force to close, the other how far down it comes.
Adjust the one for how far down it goes.

Jul 17, 2013 | Building Materials

1 Answer

Door goes 3/4 way down

The motor thinks there is an obstruction, Try greasing any moving parts, They are tricky to set up right and you may have to get the door adjusted and serviced.

Mar 08, 2012 | Chamberlain 1/2-HP Whisper Drive Belt...

1 Answer

Door comes down and goes right back up. then the lite blinks 4 times with a click noise. the safety eyes also are not on

It sounds like you need to adjust your down limit switch and/or perhaps your motor force settings. If the limit switch is not in the sweet spot along the rail it can be triggering too soon or not in time. In your case it could be too far down the rail and thus not stopping/slowing the motor in time. Your door is then being pushed against the floor too hard. Your safety/return force is goes way over limit and tells the opener to go back. While closing your door look at your rail and if its bending when the door hits the ground, this is definitely happening. After finding the sweet spot for your down limit switch, you can readjust your return/safety force per your opener manual.

Jan 03, 2011 | Chamberlain 12HP Power Drive Chain Drive...

1 Answer

The garage door goes all the way down but then goes right back up - it does not close

Had similar problem. Re-program travel and force limits. Make sure that travel limit (down) does not go too far (thus excessive force). Apparently this system has a force sensor that senses if there is something in the way of the door. This is different from the safety sensor "eyes". The problem in your setup is that you have programmed the door to travel down too much and he system looses its ability to use force sensor. Adjust travel limit (down) to a little less travel and you will be fine.

Oct 22, 2010 | Chamberlain 1/2-HP Whisper Drive Belt...

1 Answer

Door goes down but continues to bounce back up

If the door reverses when it hits the floor it is traveling too far in the down direction. Locate the 'down limit' adjustment on the side of the motor unit. Turn this control in the opposite direction of the arrow printed on the cover. Some tweaking will be necessary to get it just right.

Oct 02, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

My garage door sometimes gets stuck and then goes

Don't tighten the chain. It sounds like you have either a broken door spring or the drive gear in the motor unit is going bad. Release the opener from the door and operate it by hand. It should be easy enough to raise that your wife can do it with no problems and it should stay put when released about waist to shoulder high.

Jul 27, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Sears technical support for craftsman products- Will not work with car and remote. Goes down with internal contol, but goes right back up. Tried resetting it fro car and remote, with no results

Sounds like you have a couple problems. The remotes not working is probably the logic board. The door coming right back up is either the door sensors misaligned or the door is traveling too far and hitting the floor.

Jan 20, 2010 | Sears Craftsman LiftMaster Chamberlain...

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