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

1 Answer

Garage door won't shut after changing gears

Door closes and then goes back up. Made adjustments and still does not stay closed. Help please

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  • maryann cazin Jan 15, 2009

    Thanks seems to be working now. Had red and blue wires crossed. thanks again.

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  • 244 Answers

If you changed gears, you may have chain out of sync. read instructions with gear kit on how to sync chain.

Posted on Jan 15, 2009

  • marty metzger Jan 15, 2009

    what blue wire on a chamberlain

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