To reset the password on the Defiant GA7X2D01AAP Castle Satin Nickel Single Cylinder Electronic Keypad Deadbolt, follow these steps: Access the Interior Assembly: Remove the battery cover on the interior side of the lock to locate the "SET" button. Press and Hold the SET Button: Hold the "SET" button until the lock beeps, then release it. Enter the Current Master Code: Input your current master code (default is usually "123456" for new locks) and press the "Lock" button. Initiate Password Reset: Press "1", "0", and then the "Lock" button. Set a New Password: Enter your new password (4-6 digits) and press the "Lock" button to save it.