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

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I can't get my chamberlain lift to set the limts. Each time the light blinks once but then blinks ten times. I have followed the instructions to the letter and tried to do it manualyl. All of the butttons work including wall and remotes. the door opens and closes but doesnt open enough.

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  • Don Maggard May 11, 2010

    It sounds like your chain may be out of sync with the limit switch. You can try this.




    Loosen the chain enough
    so that you can remove it from the sprocket above the motor unit.
    With the door closed run the motor until the sprocket turns clockwise
    and stops. With everything attached replace and tighten the chain.
    Some adjusting of the up and down limits will probably be required.

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  • Master
  • 3,197 Answers

Contact Chamberlains Technical Support Hotline at 800-528-5880. They will help you.

Posted on Feb 03, 2010

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