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

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Hi I have a liftmaster garage door opener. It has been stopping alot during the opening and closing process. Nevertheless, it has continued to work. Now when I hit the main button on the wall, it only turns the light on and I hear another click. It then has a blinking yelow light up on the motor casing mounted to the ceiling. The chain has stopped moving altogether and now I have to use the door manually. What Happened? Plz help!!! Tami

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There are a couple of different models out there but they are all pretty much the same. Have you tried running the operator with the door being in manual mode? If you have not, push the wall button and see if the operator does anything.

If the operator runs fine without the door attached then try this:

Look for 2 blue tear drop shaped knobs, if you have a one light bulb or a 2 light bulb front and back those knobs will be on the back. If you have a 2 light bulb side to side, the knobs will be on the right side (right next to where the wires hook in to the operator). Turn the knobs slightly clockwise. The door should then move. If it moves more than it did but still stops, tweak them just a little at a time.

Let me know if this helps or not.

Posted on Sep 11, 2010

  • selinaarnold Sep 13, 2010

    I tried turning the blue buttons, I have the 2 light unit. Nothing changed. the lights come on but the chain or motor does not make a sound. Whetther in automatic or manual mode. The small yellow blinking light on the operator comes on when I hit the wall control button, and will reset when I hit the Red button next to it. But then comes on again if I push the wall control button. Sound like anything familiar? I did not get a manual when I bought the house. HELP?

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