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

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Posted on Mar 13, 2010
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Door opened when i came home but opened slowly then would not open again makes adelayed tumpping sound then doesn't do anything.

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  • Master 3,197 Answers
  • Posted on Mar 13, 2010
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Joined: Apr 29, 2009
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You need to check your door springs and the drive gear. You may have a broken spring or your drive gear may be stripped. Remove the cover from the motor unit and it will be obvious if the gear is bad.

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