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

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Door will not stay down.

Just started to happen. Adjusted the settings on the motor for up and down with no results. Could it be the electric eyes out of alignment?? And if so, how do you get them aligned again??

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  • msmike Feb 04, 2009

    Where is the travel adjustment on the garage door?

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If it were eyes, doors would open and light bulb would flash ten times. sounds like travel adjustment needed to be peaked.

Posted on Jan 22, 2009

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Someone else can join in, but I think when it only moves that little, it has to be the RPM sensor. It may be installed correctly but the electric eye that "sees" the vanes turn may be dirty. Clean that out. I'll try and add the picture, or try here:
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If the eyes are mounted to the track. Many times the track wll move as the door closes causing the eyes to move out of alignment.
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Lube the springs, wd-40 rust may be the whole problem.

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