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

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Door barely opens/ opens with physical lifting assistance

Help! Chamberlain liftmaster Pro 1/2 hp door recently came off the rails, when replaced, the door barely opens (a few inches, but it will open with some physical force also lifting the door! Please help! I need to get my car out!

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It sounds like you have a broken door spring or the drive gear in the opener is stripped. You will have to take the cover off the opener and you will find the white nylon gear just in front of the motor.

Posted on Sep 08, 2009

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Posted on Jan 02, 2017

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Watch the door go up and down to figure out the problem, but it sounds like a problem with the springs. We have had similar problems with our garage and it is usually because one spring has more tension on it than the other so when it tries to go up one spring pulls more than the other and the door gets wedged on the rails. I have found this usually occurs when the springs get older and they usually break a short time later. The best solution I have is to check and possible replace the springs.

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Okay...upon further inspection, my left spring has broken in two. Going to call around for some quotes to replace the spring. Thanks for the suggestions.

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