Question about Sears Craftsman LiftMaster Chamberlain Garage Door Opener Wireless Keypad Model 976LM Security+
I just purchase a home with a Model 139.53776 garage door opener. I do not know what the code is for the outdoor transmitter. How do I change the code?
There is a "learn" button on the garage door opener unit itself that you press before entering a code on the outside transmitter. This allows the receiver to learn a new code. The button is on the rear end of the housing near the terminals where the inside operation pushbutton connects.
Here's a link to programming instructions for a compatible unit by another manufacturer:
Posted on Nov 23, 2008
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Posted on Jan 02, 2017
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