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

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Light-master garage door opener - re-engaging the motor after dis

We had a power outage. In order to open the garage door I had to pull on the rope mechanism that disengages the chain and allows me to lift the door manually. Now that I have power back, how do I reverse the process and re-engage the motor. From what I can see, the chain has been disconnected from the gears just above the door to allow me to open it manually.

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  • Anonymous Apr 15, 2009

    Lost power. Pulled rope to disengage door to open. Power restored. Power button moves chains upward and downward, but the garage door does not follow. How do I sinc the door again?

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The chain and bracket should automatically engage the door's bracket just use the remote as normal,

Posted on Feb 20, 2009

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6 Answers

How to open the door if no electricity


Almost all garage door openers have a switch mechanism that will allow you to open the door manually. It is usually a pull cord on the motor or track. Pulling it down usually deactivates automatic mode. Just pull it up into position when the electricity comes back on.


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I predict that you pulled the cord due to power outage. After power is restored you can reset it by having the door in the open position and pressing the wall button to open the door with the opener. It should re-engage by itself if it is properly set up.

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Be sure the level that the release rope is connected to is pointing towards the motor unit, and raise/lower the door to the position of the inner carriage, so that they will engage. If the inner carriage is fully closed and will not move to the open position, or still will not connect with the outer carriage, you will need to have the opener serviced.

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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.

Second is if the door is reversing when it hits the floor. This is a problem with the door traveling too far in the down direction. Locate the 'down limit' located on the side of the motor unit and turn it a bit in the opposite direction of the arrow printed on the cover. Some tweaking may be necessary.

To release the door with the rope - pull straight down and then pull the rope in the direction away from the door. This should lock the mechanism in the open position. To release this pull straight down and release.

Sep 15, 2011 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

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To make sure the trolley will engage properly pull straight down on the rope and release. Then you can either run the opener or move the door by hand. One way or the other it should connect for you.

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1 Answer

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try pulling emergency rope open door and close it this may reset opener if you have electric eyes make sure they are clear and they line up

Feb 06, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

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Make sure the rope hanging down has not been pulled. If it has the door has been disengaged from the opener. You can correct this by flipping the metal part up (that the rope is connectd to) toward the drive track. Then open or close the door using the remote. The track should grab the door again.

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