Yale Living YRL216 Installation And Programming Instructions page 18

Resetting Lock to Factory Default
Interior Lock
Reset Button
When resetting the lock, all user codes, including the Master PIN code*,
are deleted. All programming features are reset to original default
settings. See "Factory Settings".
1 . Remove the battery cover and batteries.
2. Remove the interior lock to access the reset button.
3. The reset button (see image above) is marked.
4. Re-insert 3 batteries and hold the reset button for 3 seconds.
5. While still holding the reset button, insert the 4th battery, and hold the
reset button for an additional 3 seconds.
6. Release the reset button.
7. Re-install the interior lock onto the door.
*Upon reset, Master PIN Code creation is the only option available and
must be performed prior to any other programming of the lock.