If you want to change the code for your keypad you just need to press and immediately release the smart/learn button on the rear of the motor unit. Near where all those white wires go. Then walk over to the keypad and enter a new 4 digit number and press enter. Should do it for you.

okay I found the button and the next question is will my car openers still work? I'd like to know before I do anything?

it will still work

If you hold that button in it will erase the codes and your remotes will not work. Press and immediately release is the key here.

okay don the codes have been erased, so how can i fix this problem.

the fcc id hbw1255 139.53681b date 04/03

Press and hold the button on your remote and then press and release the smart/learn button. Do this for each remote you have. Do not hold the smart/learn button in or it will erase the codes again. Now follow the instructions I gave your earlier to change the code on your keypad. They are above.

thanks don you have been a great help and everything worked.