Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
I was able to solve the problem by adjusting the up resistance. Not sure why it went out of adjustment - maybe the cold
Posted on Dec 11, 2008
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Posted on Jan 02, 2017
Tips for a great answer:
Aug 30, 2014 | Chamberlain Liftmaster Professional 373lm
Jan 02, 2013 | Home Security
I recommend this to everyone with garage door opener problems:
Use the pull cord and disconnect the opener from the door. Operate the opener and let the carrier slide back away from the door. Is the carrier moving smoothly when disconnected? Next, lift the door by hand from the bottom to the top. Is it moving smoothly? If not, lubricate the axles of all the rollers on both sides of the door. Check the cable pulleys at the top sides of the door channel, lubricate them as well. Are all cables in all the pulleys, there are 4. After checking those things, there is a "up force" and "down force" adjustment on the opener, try increasing the "up force" by turning the adjustment in the direction of MORE force.
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