Craftsman and LiftMaster Keypads
Enter the current PIN into the keypad.
Push and hold the "#" button.
Release the "#" button when the keypad blinks two times.
Press the numbers for the new four-digit PIN you want to use.
Press "Enter." The motor unit light will blink once.
Enter the four-digit PIN and press "Enter" to test the garage door opener.
Slide the switch on the device to the "On" or "Program" position.
Enter your PIN. The PIN can be as many as six digits.
Slide the switch back to "Operate" or "Off."