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

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Sears garage door opener only open half way going up..

Every time i open my garage door, it only opens up halfway then stops. please help. thanks!!!

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This one is easy...there inside your garage door opener, the one on the top of your ceiling in your garage has little like knobs ..mine has a straight like screw driver circles attached to knobs. Round dials with screw driver like knobs on top of them...they are adjustable. your "tune" them until they just stop where you want them, don't forget to grease your chain, keep your tracks clean of dust, and make sure your safety "stops" are working properly so that if children are in the way, it will stop. Also..make sure there is nothing in the way of the track. If the sensor "senses" a block...that will also cause it to stop halfway. Now if you could tell me how to change my combination on my keypad...I'm all set.

Posted on Apr 15, 2009

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Garage door opener trolley keeps shearing off. Had it replaced a year ago, and I noticed that it is making a grinding noise and I can see it is halfway sheared off again.


issue with counterbalance springs. when you release trolley, door should balance at half way open. if i rises all the way on its own, or falls closed, then the springs are an issue and motor and trolley are working very hard in one direction or the other.

Oct 08, 2015 | Sears Craftsman LiftMaster Chamberlain...

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I have a Merlin Powerlift 2500L that opens and stops half way. When disconnected from the door, the release rod travels the proper distance. However, when the door is connected, its upward movement stops...


Release the door from the opener and operate it by hand. Check for binding and excess heaviness of door. You may also need to increase the up force. Heaven only knows where it is on a Merlin.

Sep 02, 2011 | Sears Craftsman LiftMaster Chamberlain...

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It has happened several times that my garage door only open about half feet and stopped at senor (infrared detector) level. Don’t know why happened. Sometimes it will work normally after several hours...


On the rear of the motor unit near where all those white wires go you will find the 'up force' control. Increase this a bit and try. Your drive gear could be going bad. It is a white nylon gear just in front of the motor. It will be obvious if it is bad.

Nov 30, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

The garage door opens halfway and then stops; it will close completely however


COULD BE A BROKEN SPRING
COULD BE A SENSITIVITY ADJUSTMENT.

HOW DOES THE DOOR WORK MANUALLY - IF YOU CAN'T LIFT IT NEITHER CAN THE OPENER.

ALSO COULD BE BAD DRIVE GEARS - BUT MOST OFTEN A SPRING 2ND WOULD BE OPERATOR ADJUSTMENT

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

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My craftsman 1/2 hp garage door goes up only about


Release the door from the opener and operate the door by hand. Check the weight of the door. If it is heavy check the door springs. One could be broken. Also take another look at the gear you replaced. Did you use the lubricant on the gear? If not the gear will not last.

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

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Door opener just stops halfway down and blinks


You may have more than one problem. If it is the main light that is blinking when the opener stops and it blinks 10 times you have a door sensor problem. I think you also need to remove the cover and check the drive gear. It is a white nylon gear just in front of the motor and may be stripped.

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

1 Answer

Craftsman Garage Door Does Not Open


Take a good look at the door springs. Might have a broken one. Also remove the cover and look at the drive gear. It is white nylon and is just in front of the motor. Could be stripped.

Sep 18, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Garage door closes and then automatically opens half way


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

TURN THE LIMIT ABOUT 1/4 TURN AT A TIME.

HOPE THIS HELPS

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

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