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

2 Answers

Automatic Garage door reverses and automatically opens after closing

When we close our automatic garage door in cold weather it will close, pause for a second and then open the door as if it has hit something. This only happens when the temperature is below 30-35 degrees outside. There is no ice build up on the door or on the garage/driveway floor and the 'eye' sensors are aligned properly. There is no evidence of any driveway or concrete heaving. Also, is it possible that the cold temperature is causing a tension problem on the tension springs so the door thinks it hit something and reverses direction? The problem goes away when the temperature goes up.

Anyways help is appreciated.

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  • dandret Oct 23, 2008

    Same problem, when temp dips into the 30's, no problems anyother time, sears screw drive opener almost 2 years old. -Tom

  • Anonymous Jan 16, 2009

    MINE DOES THE SAME THING. IF I HOLD THE BUTTON DOWN, IT WILL STAY SHUT. I AM A SINGLE MOM AND HAVE NO IDEA WHERE THE ELECTRIC EYE OR TRANSMITTER ARE. ALSO, I CANNOT GET THIS SYSTEM TO PROGRAM TO MY HOMELINK SYSTEM ON MY NISSAN PATHFINDER. I JUST MOVED TO THIS HOUSE AND AM ONLY RENTING, BUT I COULD PROGRAM IT TO MY OLD OPENER. I HAVE MASTERED THE CODE AND THE REMOTE PROGRAMMING, BUT NOT THIS. THANKS FOR ANY ADVICE.

  • david-bann May 23, 2009

    I have a similar problem - I have not yet linked it to temperature though... My door also closes all the way and then opens again as if it hit something. I have tried to see what is causing the problem, but have not been succesful - I don't know how the sensors work, and how to adjust or play around with them...

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I can't believe it! My opener works fine a 10 degrees and above but below 10 degrees it would go down a little ways stop and go back with the light flashing. I checked the electric eye and found it would go out of alignment when the temp drop. Who knew!
I made the adjustment and it now works fine.

Posted on Jan 24, 2008

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I had a similar problem and traced it back to the electric eye that makes sure there is nothing in the way of the door that would be crushed by it when it closes. Somehow, the receiving end was moved slightly. It was receiving enough light to start the door moving, but the shaking of the door as it came down, diminished the light enough that the door thought something was in the way and went back up. Once I aligned both the light transmitter and receiver, it started working again. Good luck to the rest of you.

Posted on Jan 19, 2008

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