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

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I have a Craftsman garage door 139.53660srt1 but when I press the garage door button on the wall the unit sounds like it is on but the sprocket on the top doesn't move the chain connected to the door. What would be the problem? This garage door opener was here when I bought the house.

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Remove the cover from the motor unit and you will find you have a stripped drive gear. The part number is 41A2817 and is available at any good door opener service company. It will come with instructions.

Posted on Apr 26, 2010

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With my door closed, i push door button to open and the chain and opener continues inthe closing mode. any help?


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Craftsman garage door opener does not working.


Press and hold the button on the wall control that has the padlock icon for 3 seconds.

Sep 19, 2009 | Sears Craftsman LiftMaster Chamberlain...

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It sounds like you have a bad wall control. You can check this out by replacing it with an inexpensive door bell button.

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1 Answer

Garage Door opened but will not close. I opened


I think the trolley has jammed against the bolt just in front of the motor unit. Remove the bolt and then run the door until it is closed. With the door closed locate the 'up limit' control on the side of the motor unit. Turn this 2 turns in the opposite direction of the arrow printed on the cover. Replace the bolt.

Sep 01, 2009 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

Craftsman Garage Door Opener won't work after storm


Check to see if the trolley (the part that slides back and forth on the rail and is connected to the door) is jammed against the bolt just in front of the motor unit. If so, remove the bolt and run the door until it is closed. On the side of the motor unit there is an 'up limit' control. Turn this 3 turns in the opposite direction of the arrow printed on the cover. Be sure to replace the bolt.

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2 flashes indicate safety eye issue. Check you wiring and make sure it is wired correctly and check to make sure the eyes are properly aligned.

Jan 23, 2009 | Sears Craftsman LiftMaster Chamberlain...

2 Answers

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a component in the wall unit is failing , that makes the conection happen when the remote signal is recieved , ( it is recieving the remote signal but not sending it out to the control circuit for the motor )

Dec 29, 2008 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

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If the safety eyes are not connected you need to ho;d the button down until it reaches the close linit.

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