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

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Door opener moves foward about 10 inches then returns

Checked sensors they are working properly if I stand in front of sensor door stops and lights blink also increased up and down force the the yellow indicator light blinks 5 times after opener returns

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  • mailray Dec 15, 2008

    Fixed it

  • mailray Dec 15, 2008

    the interupter cup assembly was off the motor

  • mailray Dec 15, 2008

    the interupter cup assembly was off of motor's shaft

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UNPLUG THE UNIT FOR ABOUT 5 MIN. TO RESET TRY TO OPERATE IF IT STILL MOVES 6-8 INCHES AND FLASHES 5 TIMES THE RPM SENSOR IS YOUR PROBLEM - COULD JUST BE THE CUP HAS MOVED ON THE SHAFT. IF IT IS IN PLACE AND STILL NOT WORKING REPLACE THE PICKUP.

Posted on May 30, 2010

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