Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
If the chain is loose I would definitely tighten it up to remove the sloppiness of the drive. That will in turn help you to accurately find the sweet spot that is currently eluding you. And you have to work fast because you do not want to overheat the motor.
Posted on Sep 21, 2017
There is no fuse in the unit. Check your house circuit breakers and if you have had electrical storms or surges you might pull the logic board and check for burnt or missing traces on the printed circuit board.
Posted on Sep 22, 2010
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