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

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My garage door goes down all the way but then automatically opens back up all the way

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  • Anonymous Jan 14, 2009

    garage door almost closes the open again, light blinks five time

  • Anonymous Feb 07, 2009

    I closed my garage door and when I came home it was up. So I pulled in and closed it then it went up and down and up and down. It would not stay closed

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Check again. blinking 10 times. electric eyes are blocked/dirty/misaligned.

Posted on Feb 07, 2009

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  • 16 Answers

Try adjusting the "close setting" limit switch. The door may be "thinking" it's hitting an oblect. i.e. car

Posted on Jan 12, 2009

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Hi. I have seen this before, although usually not from chamberlain garage door openers.

Pull the release cord that unlocks the door from the opener, and manually open the door ALL the way open.

Then lock back in place in the open position.

Then use automatic opener to shut door.

It will close very slowly, but should close all the way.

Then, open the door again using the remote, and the door will once again open slowly, this time it should open all the way.

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This is why your door is acting up.

I would also look up by the belt drive connects to the front of the garage door opening, to make sure there isn't any dirt, cobwebs, or other obstructions on the sensor that may cause it to re-close the way it does.

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Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+: Door goes down and when it reaches the bottom, it ...


If the door hits the garage floor and then reverses to the open position you need to adjust the 'down limit' which is on the side of the motor unit. Turn this control in the opposite direction of the arrow printed on the cover. Some tweaking will probably be necessary.

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Okay here we go.

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IF IT HITS THE FLOOR AND GOES BACK UP. YOU NEED TO ADJUST THE DOWN LIMIT.

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