Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
I had the same problem and I found an old Liftmaster keypad instruction handbook. Check out the picture below and follow what it says. It worked for me!
P.S. Sorry if the picture is hard to see.
P.P.S. To change your 4-digit PIN:
Enter existing PIN, press *, enter new PIN and press *. To test and use, enter your new PIN and press the 0 key.
Posted on Nov 12, 2015
You must have a wired keypad. To program the keypad, first unplug the garage door opener from the electrical outlet. Next, remove the nameplate from the console that the keypad plugs into and locate the program/operate switch. Flip the switch to program. Next, enter your desired four-digit PIN number into the keypad. Slide the switch back to operate and plug the garage door opener back in. The keypad should be programmed.
Posted on Jun 25, 2009
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Posted on Jan 02, 2017
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