Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
All my garage door transmitter suddenly will not work. I tried reprogramming all transmitters but they still will not work. The garage door only closes and opens using the manual switch, not transmitters will work with it.
The lock is probably engaged. Look at the wall button, the green light is probably flashing. Hold down the lock button for 3 seconds and light should be solid. Your remotes should work now
Posted on Jan 19, 2009
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Posted on Jan 02, 2017
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