Checking each of the parts of the garage door opener and the garage door itself will usually reveal the problem.
Craftsman garage door pad reset.
It may be as simple as new batteries or replacing wires.
Craftsman garage openers restrict entry to your property via a wireless keypad mounted to the outside of the house.
Members of your family and visitors must enter a four digit code to activate the opener and enter your property.
People often change the entry code if it has been forgotten or found.
The fix is usually something minor.