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

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Garage door sensors out of alignment

I have one green light and one yellow light on my garage door sensors which is causing my garage door not to raise all the way up, it currently only goes up about a foot, then stops. How do I get both light green again?

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The lights are suppost to be yellow (power to photo eyes) and green (lined up).
 1.Check to see if the door is running correctly.
  A. Run the door down and pull the emergency release. See if the door will run easily by itself.
  1. If it runs hard by hand try lubricating the rollers and hinges with silicone spray or some form of lubricant (not WD 40)
  2. If the door is heavy and falls back to the ground, you probably have a spring issue (either broken or needs more tension) in this case call a professional door repair company in your area.
  B. If the door runs fine then check the up force on your operator (the box that hangs from the ceiling). If the light bulb(s) on your operator are on the front and/or back, the force adjustment screw is on the back of the operator. If the lights are on the sides of the operator then the force adjustment screw is on the right side (looking from the back of the operator and facing the garage door). Turn the light blue adjustment screw with the up arrow to a higher number.

Posted on Jan 10, 2009

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