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

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Garage door bounces back open - Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+

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It sounds like your door is traveling too far in the down direction. Locate the 'down limit' control on the side of the motor unit and turn this control in the opposite direction of the arrow printed on the cover. Some tweaking may be necessary.

Posted on May 17, 2010

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My garage door wont stay close even after following the instruction on how to learn the travel limit.


What about force setting. It should be set about a little less than half. If it hits the ground and bounces back up even after you positively check the travel limits than its the motherboard/logicboard.

Feb 01, 2016 | Building Materials

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

Chamberlin garage door opens to top limit bounces back to return down about 6 inches and then returns to open limit. What adjustments are neccessary?


The limit switch of both the sides are not reached. The drive must be realigned to work till the door closes fully so as to touch the limit swittch to switch off.
Similarily the open door must go to the extreme point to cut off with the activation of the limit switch.

Sep 11, 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

Garage door bounces back open


It sounds like the door is traveling too far in the down direction. Locate the 'down limit' adjustment on the side of the motor unit and turn it in the opposite direction of the arrow printed on the cover. Some tweaking of this control will probably be necessary.

Mar 21, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Chamberlain Liftmaster bounces back up sometimes...


On the side of the motor unit you will find the 'down limit control'. Using a small screwdriver turn this control in the opposite direction of the arrow printed on the cover. Some tweaking will most likely be necessary. You can remove the cover and watch the limit switch assembly and get a good idea how it works.

Sep 30, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Liftmaster formula 1 garage door opener keeps "bouncing" open


If the door reverses when it hits the floor it is traveling too far. Locate the 'down limit' control on the side of the motor unit and turn this in the opposite direction of the arrow printed on the cover. Some tweaking will most likely be necessary. You can always recognize a sensor problem because the main light will flash 10 times. If the main light isn't flashing it isn't a sensor problem.

Sep 26, 2009 | Sears Craftsman LiftMaster Chamberlain...

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