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

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Door opens only 6 inches and stuck

I have a 1/2 craftsman garage door opener for 8 yrs installed by Sears and is working perfectly fine. Today, it just opened up to 6 inches and stopped.It won't open all the way. It will open and close only 4 inches from the ground.I checked for possible obstruction and found none. Any ideas to fix it?
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  • jamwilk2000 Oct 27, 2008

    I have the same problem, my door opened aprox. 6" and stopped. When I push the remote or the wall switch it goes down and back up 6". I removed the cover and checked the gears and limit switches and both appear fine.



    I disconnected the trolley from the door (pull cord release) and now the trolley runs back and forth aprox. 6" when I push opener button.



    After repeated operations the trolley is moving further up the rail but stopping and going back down aprox. 4".

  • Anonymous Dec 16, 2008

    Same problem. Six inches only. My kids use the keypad and have to roll under. For a while in only happened once and a while. Now it will only open six inches. What to do?



  • rdnt143 Dec 16, 2008

    Same problem. Mine also seems to have a correlation to cold weather



  • Anonymous Mar 29, 2009

    I have the same problem, my door opened aprox. 6" and stopped. When I push the remote or the wall switch it goes down and back up 6". The solution suggested did not fix my problem and my sensors seems to be good...any other suggestions?

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I would try jumping a wire across the white & red terminal to see if your safety sensors are working Properly! If your door opens you have a loose connection or faulty sensors.

Posted on Dec 16, 2008

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