Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
For a few days it stopped at about 6 feet but today it is only going up the 2 feet. It will open with a bit of hand pressure from the bottom. It may need lubricating or maybe there is something wrong with the drive. It has happened in the past once or twice in cold temperatures. Nights are now dropping to low 40s.
On the rear of the motor unit you will find the 'up force' adjustment. Increase this a bit. You need to also take the time to remove the cover and look at the drive gear. It is a white nylon gear just in front of the motor and may be going bad.
Posted on Sep 28, 2009
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Posted on Jan 02, 2017
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