This is a Craftsman 1/2hp 139.53636SRT opener. I would like to change the code on the outdoor mounted wireless keypad. There are no instructions in the owners manual..
On the back of the motor unit just to the left of where all those white wires go you will find the smart/learn button. Press and immediately release this and then walk over to your keypad and key in any 4 digit code you like and press enter.
YES!! That green button is called the SRT button. Thank you! I was able to change the entry code on the keypad no problem.