Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
Craftsman 1/2hp garage door opener, chain driven, about 20 years old
does not go all the way to the floor when closing.
Stops about 3" from floor.
side adjusting screws do not effect travel.
I'm no expert, but on a previous door opener I had (don't know the brand), the side adjusting screw basically adjusted a limit switch, which was located inside the plastic housing (where the motor is). I was able to remove the housing, figure out which limit switch was actually being contacted "too soon" on the way down and adjusted it while watching it.
Just a suggestion, you might take a look.
just keep your hands out of the way of the chain and sprocket if you do take the housing off. .
Posted on Mar 03, 2009
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Posted on Jan 02, 2017
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