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

2 Answers

Liftmaster Garage Door Won't Close

My garage door opened just fine. Then, I went to close it and it does nothing with either the remote or the push button control pad by the door. The photo eyes' lights appear fine and there is nothing blocking it. The motor just never starts.

It's a 1/2 hp Liftmaster opener. Any ideas?

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  • tomandjobeth Jun 01, 2010

    The trolley is about 2 inches away from hitting the bolt. The door opener has power to it as the lights come on when you push the opener button but the motor never even comes on to start the chain going down. Could it still be the chain? (I haven't yet loosened it.) Thank you so much for the help.

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I ran into the same problem except my opener clicks. I took the chain off and still nothing but clicking and the motor shaft turns about 2 turns. Does this indicate the rpm sensor is bad or the logic board?

Posted on Jun 03, 2010

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Sounds like maybe the door traveled too far and the trolley has jammed against the bolt just in front of the motor. If so, loosen the chain enough to take the tension off the chain and then run the opener until the door closes. While the door is closed locate the 'up limit' control on the side of the motor unit and turn it 2 full turns in the opposite direction of the arrow printed on the cover. Tighten the chain.

Posted on May 27, 2010

  • Don Maggard Jun 01, 2010

    No I don't think it is the chain now. I would pull the logic board and check for loose or missing traces on the printed circuit.

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