Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
LiftMaster Pro 1/2 hp 41AS050-1 won't shut. when I attempt to close the door from the wall switch, the door begins to close but only goes about 6 inches and stops and the light on the motor starts flashing. I checked the sensors located near the floor at either side of the opening. One sensor light is green, the other sensor light is yellow. nothing is in the way, though the door stops as though there is an obstruction. Any advice would be greatly appreciated. Thanks!
Check the resistance down button (There is one for down and another one for up). You may need to adjust the sensitivity. That way even if for some reason the have hard time coming down, less sensitivity may solve that issue.
Posted on Oct 25, 2013
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Posted on Jan 02, 2017
is bulb on motor flashing 10 times. then you have electric eye problem. otherwise, sounds like you need to increase down force a hair. adjustement is on logic board, right knob.
Posted on Jan 15, 2009
SOURCE: Liftmaster 1/2 - Will not close
What usually happens is a sensor gets bumped so that they no longer are pointed at one another. They must be for the light on the second sensor to come on. Tweak them and see if you can get the light to come on. If you can't you either have bad wiring going to that sensor or the sensor itself has quit working.
Posted on Jun 15, 2009
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