Searching for Guardian DeWitt 1A ANSIZ 971-2009 1201 11 1/8

Question

I hope these photos are good enough.  The latch is free standing. No tension to lock or unlock the sliding glass door.

Bob · Accepted Answer

Thanks for posting. It certainly sounds like the mortise lock should be replaced. See our 82-218. The video below shows how to remove and replace this type of lock. Check the handle set to make sure the spindle isn't damaged at all--if so, our 82-030A should replace this.