The Yale Real Living lock will automatically determine whether it will function as a right or left-handed lock. (The "hand" or "handing" of the lock, is determined by the side of the entry door that the hinges are on when standing outside the door).  When the batteries are properly inserted for the first time, the lock will attempt to determine its handing - whether the lock is installed on the door or not. If the lock is not completely installed on the door when the batteries are inserted, it could hand itself incorrectly. Should this occur, the lock must be installed on the door and then reset to its factory defaults, allowing the lock to "hand" itself correctly.

To reset the lock to factory default, see the following:

The following procedure clears the automatic handing of the lock and returns the lock to programming default - deleting
all user codes and setting the Master PIN code* back to the default ("12345678").  

1. Install lock completely on the door
2. Remove the batteries and then remove the inside escutcheon to access the reset button. The reset button is located above the PCB cable connector
3. Hold down the reset button for a minimum of 3 seconds and then reinstall the batteries; once the batteries are properly installed, release the reset button.
4. Install and reassemble the lock on the door