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

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Craftsman opener is not responding to limit switch on the down phase-- it continues down until the door goes full closed position and auto reverses. any suggestions? I have replaced the limit switch and the receiver logicboard assy.

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On the side of the motor unit you will find the 'down limit' control. Turn this in the opposite direction of the arrow printed on the cover. It would be a good idea to take the cover off and watch the limit assembly while you are doing this to make sure it contacts before the door hits the floor.

Posted on Sep 07, 2009

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