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

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Sears Craftman Garage door opener model # 41a3493-1. Does it have auto reverse?

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Don Maggard

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That isn't the model number you give it is the part number for the logic board. The model number is on the opposite end of the motor unit and starts with 139. If you are asking if the opener should reverse when it hits an obstacle the answer is yes. If it doesn't it is not adjusted correctly or is faulty.

Posted on Dec 01, 2009

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New Sears craftman 1/2 horsepower garage door opener not staying closed, trolley is hitting bolt stop and auto reversing.Have tried to adjust the down force and the distasnce down setting to no avail?


The 'down limit' on the side of the motor housing is what needs to be adjusted. Turn this control in the opposite direction of the arrow printed on the cover. I usually adjust this so it stops short by quite a bit and then fine tune it.

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1 Answer

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If the main light flashes 10 times when the door reverses it is a door sensor problem. Make sure the sensors are pointed at one another and the small light on each one is lit and not flickering. Tweak them a bit.

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1 Answer

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Oct 12, 2010 | Sears Craftsman LiftMaster Chamberlain...

1 Answer

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DID YOU REINSTALL THE LITTLE "CUP" ON THE MOTOR SHAFT.

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1 Answer

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1 Answer

My Sears Craftman garage door opener closes about 1/3,stops,and reverses.When I activate the remote again it stops rising,starts down again, comes down another foot or so,stops,reverses etc.,etc,etc It...


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1 Answer

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2 Answers

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