How easy is it to replace the Andersen sliding door latch?

A home owner from South Orange, NJ says:
Looking for this part for my patio doors by Anderson. I believe this room was renovated in the late 70's.

The door handle is fine, it's just the thumb latch that is broken. Appears that the latch piece has broken off. I believe your part 82-043 may be the right one. Is it really as simple as placing the flat post on the inside of the latch into the corresponding slot? (or do I need to replace the hooked mechanism as well?)
User submitted a photo of a thumb latch.
Profile picture of Tom
Tom from SWISCO responded:
Good morning! Andersen has discontinued the style thumb latch you currently have. The updated version of the thumb latch is our 82-043 .

Installing the new thumb latch is as simple as making sure the flat tail fits into the corresponding slot of the mortise lock. You shouldn't need to replace the inside mortise lock unless it is not functioning correctly. If you do need to replace the mortise lock and you have a 2 panel sliding patio glass door, see our part 82-037 .
How to maintain a sliding glass door
How to maintain a sliding glass door
Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)
Current wait time is 4-7 business days
We promise that one of our experts will personally get back to you as soon as they are able. Thank you very much for your patience and understanding. If your inquiry is time-sensitive, please feel free to reach us at (888) 991-1929 or at