Andersen latch or mortise lock loose
Andersen patio door lock with alignment pin
Andersen 2565507 mortised lock (discontinued...of course) with Thumb latch on patio door. Latch is so loose, it falls locked on it's own. No visible way to tighten either part. When taken apart, lock turns with no resistance and latch falls without resistance. Which part is the problem? Mortised lock isn't sold separately, so do I need new combo? Thank you.