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

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Garage door closing issue

I've got a sears craftsman model with a closing issue. When I go to close it, it gets about four inches from the ground then stops and reopens. If I close it again and help it down, it closes fine. Nothing is in its way ever. Could it need a downforce adjustment?

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