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

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Craftsman 1/2 hp door opens only 8-10'' then stop

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Check your door springs. One of them may be broken. Also remove the cover and check the drive gear. It is a white nylon gear just in front of the motor and may be stripped.

Posted on Sep 03, 2009

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Check to see if a garage door spring has broken. Operate the door by hand. If everything seems ok then increase the strength of the "up" force. There is an adjustment on the powerhead to do this.

Posted on Sep 02, 2009

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Don't know Mod. No. lost installation manual, approx. 5 yrs. old Need installation manual.


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Feb 03, 2016 | Garage Doors

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My Craftsman 1/2 hp garage door opener will go up fine with the push of any button but it starts then stops when I try to push the button for it to go down. It acts like there is something in front of the...


If the main light flashes 10 times when the door stops it is a door sensor problem. Make sure the small light on each one is lit and not flickering. If the main light doesn't flash you have either a bad IR sensor which is a small printed circuit board just in front of the motor or you need to increase the down force which is a control on the rear of the motor unit.

May 10, 2010 | Sears Craftsman LiftMaster Chamberlain...

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I have an old craftsman 1/2 hp door opener. It


You may have a bad wall control. Try disconnecting it from the opener and try. Otherwise it is time for a new model.

Apr 26, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Craftsman 1/2 HP garage opener opens only 6 inches


Remove the cover and check the drive gear. It is white nylon and is just in front of the motor. It may be stripped. Take a close look at those door springs. They can sometime appear to be okay when one is broken.

Oct 10, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

I have a Craftsman 1/2 HP chain drive garage door opener.


You need to take the cover off the motor unit and watch how the limit switch assembly works. If the door is not stopping when the contacts make then you have a bad logic board.

Jun 14, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Programming kepad for Sears Craftsman Garagedoor opener 1/2 hp


The only procedure I have ever followed is to press the learn button and then enter the code, and not do anything else. I think your last step of holding the button until the light goes out is clearing codes as fast as you enter them. Just stop after you enter your code and let the learn mode time out on its own. That should do it.

And don't put your head through the wall. It just causes more headaches.

Feb 21, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Door sometimes stops during run as if sensor is blocked


wipe off the sensor glass with a isopro rubbing alcohol; it should fix it.

Jan 12, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Craftsman 1/2 hp opener


I am sure that your lift gears have stripped and need to be replaced.

Sep 09, 2008 | Sears Craftsman LiftMaster Chamberlain...

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