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

Garage Door opened but will not close. I opened

The garage door to move out some furniture. When I pushed the garage button on the wall to close, I just hear a short humming sound. The door does not move. I released and manually closed the door. When I push the wall button, there is no movement of the chain just the hum sound. I have reset the power at the fuse box but since the lights and hum sound I assume it is getting power. My wall has 3 buttons that include a Light, Lock, and Open Close. I have tried with no luck pushing the Lock button thinking somehow I inadvertently locked the unit. The garage door is a Craftsman 41A4315-6A. Any suggestions? Thanks in advance.

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Don Maggard

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3,197 Answers

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.

Posted on Sep 01, 2009

aakk611 Nov 03, 2010

how can you remove the bolt when the trolley is totally jammed into it. the question is how can youmove the trolley away from the bolt just a little so a wrench will fit in there to remove the bolt

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Garage Door opened but will not close. I opened

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Don Maggard

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Garage Door opened but will not close. I opened

1 Answer

Don Maggard

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