I need to change the password on a Craftsman keyless entry system. The system is for a garage door model #139.53662SRT

You will have a orange or red learn button on the side on side panel of motor unit. Will need to remove the light cover to access it. Press and release the learn button. Within 30 sec you must enter new 4- digit pin # and hold enter button for 5 sec. When the light on the keypad stops flashing test your new code by entering the new 4 digit pin and enter Good Luck