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

1 Answer

Craftsman 1/2 hp opener

My 1/2hp opener after reaching full open status will slip back down 12 to 16 inches and then re-activate the motor and go back up. This will repeat 3 or 4 times before finally stopping at one or the other position.

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  • kenreneer Sep 10, 2008

    Thank you for your interest and help. I believe and hope that stripped gears are not the problem as the unit is less than a year old and has been doing this from the start.

    Could it be a spring problem?

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1 Answer

I am sure that your lift gears have stripped and need to be replaced.

Posted on Sep 10, 2008

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Just a suggestion, you might take a look.

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1 Answer

Sears Craftsman 1/2hp Garage Door Opener


Thats one of the symptoms of a lightning strike or a power surge. Without actually being there I would suggest replacing the back-board. But as with lightning strikes and power surges sometimes other electronic components could have been damaged as well.

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