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

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TRouble getting the door to close without banging into the overhead motor. Is there a manual available to help?

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  • Don Maggard May 11, 2010

    Make and model would help.

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I would remove the logic board and look for loose connections on the printed circuit.

Posted on Nov 16, 2009

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2 Answers

Door won't close


Your not clear what is going on but my door would not close because the sensor near the bottom of the door as not lined up with the other side. they both have to be in line with each other and also if there is dirt even a leaf over the sensor on either side it won't work either. Is your sensor wire on the over head box out in the open where it should be? If its not opener problem I don't know as you are not clear.

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Not much info here. Do you hear the motor running? If so, there are some plastic gears that strip out quite often. The door won't close if your photo sensors across the door are messed up. Look at the overhead motor, get the model #, get the manual from the net. I found manuals for many of them. They have trouble guides usually.

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Make sure nothing is blocking the sensors on the floor at each side of the door.

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The one is working, the other is not.

First, look for a blown fuse.

Disconnect that 2nd motor (if you can find the connector), and use a volt meter to see if power is getting to the motor and the motor does not work, or the power is not getting there.

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You may have already checked this but there is a switch located close to the overhead button that will disengage the door buttons for child safety, is that turned off?

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