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

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Garage door is going down too far

I have a Craftsman Liftmaster 1/2 HP opener. My garage door is going down too far (it reaches the bottom, and then the trolley continues, flexing the entire assembly), and it is not going up high enough. It seems to have been shifted by ~2 feet. I'm wondering if the up and down limits need to be adjusted, but I can only find the up and down force adjustments. There is a diagram on the side that seems like it might correspond to the limits, but I opened up the panel and don't see anything to adjust. Unfortunately I cannot find a manual at home or online. Any help would be greatly appreciated.

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Use a flat blade screw driver to adjust these limits by inserting it in the holes as labeled . Start gradually adjusting and stopping the travel if needed by pushing the open/close control as per usual.

Posted on Aug 02, 2009

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