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

1 Answer

Liftmaster garage door opens and shuts but when it reaches the closed position on the floor of the garage, it automatically reverses and opens back up again.

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  • peppermint_a Sep 11, 2008

    One out of 3 times of closing the garage door it will open before it is in the fully closed position. Usually the second time it will close completely.

  • lmhngr Nov 07, 2008

    door goes all the way down untill it bottoms out, then goes back up. I have watched the limit switch and noticed that it will hit the limit switch and overtravel

  • yvey43 Nov 11, 2008

    I have the same probelm with the Liftmaster. The door will go up and down but will not stay in the down position. I have to manually close the door each time.

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  • 476 Answers

Is there something jamming it travel of the door?
or does the travel distance of the door need adjusting?
How many remotes do you have?
do their batteries need a changing?
even with the power disconnected you should be able to close the door,
do this and check from there,
any of the switchs sticking down?

If it persists then call some one to fix it,
They are normally bullettproof if installed properly and servicing and lubracating them seems to be a good idea too,
some buildings shrink and contract more than others
Yours seem to be normal movement of the building structure.
winter and summer situtation.

check the adjustments on the travel,

Let me know the outcome thanks .....

Posted on Aug 02, 2008

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There are two possibilities here. First is if the main light flashes 10 times when the door reverses it is a door sensor problem. Make sure the sensors are pointed at one another and the small light on each one is lit and not flickering. Tweak them a little. If you cannot get both lights to come on you have bad sensors.

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