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

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My Craftsman 1/2 hp garage door opener will go up fine with the push of any button but it starts then stops when I try to push the button for it to go down. It acts like there is something in front of the sensor but there's not. And the sensors are lined up fine. Help!

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If the main light flashes 10 times when the door stops it is a door sensor problem. Make sure the small light on each one is lit and not flickering. If the main light doesn't flash you have either a bad IR sensor which is a small printed circuit board just in front of the motor or you need to increase the down force which is a control on the rear of the motor unit.

Posted on May 10, 2010

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Posted on Jan 02, 2017

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