Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
The most common cause of this is a bad wall control or the wiring going to the control. You can do a process of elimination by removing the 2 wires on the back of the wall control and later on you can remove the wire from terminal 1 on the back of the motor unit. Be sure to remember where the 2 wires go on the control as they are color coded.
Posted on May 15, 2009
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Posted on Jan 02, 2017
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