We're having a new door installed, but reusing an old lockset that was replaced under warranty. (Finish failed).
At first the key for the replacement lock also worked in the new door/old lock. But now it does not of course.
I took the pins out of the cylinder and no combo of pins seems to give me a nice flush set of pins. I did notice that the pins seem to have some coating on some of the ends. So I'm wondering if the lock had some sort of spacing compound to rekey the lock?