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

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Sears auto garage door opener not opening and closing properly

I have a Sears Mastercraft Automatic Garage Door opener , not sure how old it is but it does give me problems closing and opening..closes for about a foot or so then it opens back up...and when it comes to opening it only opens about a foot or so and then it stops.
Hope there is some kind of adjustment that can be done...it does it more when it is really cold out but it also did it ocasionally when the weather was warm.
Thank you
RMC

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Remove the cover and check the drive gear. It is a white nylon gear and just may be stripped. Also on the rear of the motor unit near where all those white wires go you will find the up and down force adjustments. Increase both of these a 1/4 turn and check.

Posted on Oct 05, 2009

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There are little knobs on the back for adjusting up and down turn them up and you should take care of your problem.

Posted on Oct 03, 2009

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