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

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Garage door opens 1 foot, then stops.

I can disengage the door from the trolley and open it all the way. With the door disconnected, the trolley also travels to the fully open position. With the door attached to the trolley, it stops after one foot. I've lubed the chain, trolley and guide rail, and still no go.

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It sure sounds like you have a broken door spring. While you are at it remove the cover and take a good look at the drive gear. It is white nylon and is just in front of the motor. Might be stripped and unable to take the weight of the door.

Posted on Jun 24, 2009

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