How do you replace the Pella Proline Sliding Door Lock?

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Quick Learner from Annapolis

Oct 4, 2013 9:16 pm

How do you remove the lock stile to access the mechanism?

12 Replies

Tom from SWISCO

Oct 7, 2013 10:52 am

Thanks for reaching out to us! I'm afraid I'm not sure which lock in particular you're referring to. If possible, Can you take a few pictures of the part in question and upload them here for me to review? This will allow us to research a solution for you.

Quick Learner from annapolis

Oct 7, 2013 7:19 pm

Sorry

The door is a pella 450 or 750 series. I am trying to get to the locking mechanism which apparently to acess it, you need to remove a wood stile piece that the lock comes thru to meet the strike. The mechanism is a swisco mechanism part 82-247.

Tom from SWISCO

Oct 16, 2013 9:16 am

Great, thanks for the updated information, and for your patience while we looked into it. I was able to get some solid instructions on how to remove a lock mechanism on this series door.

To replace this hardware, first you will need to remove both the handle and lock housing cover. The cover is attached to the panel stile with several screws, which are each driven below flush to avert interference with the lock housing cover. Each of these screws must be removed in order to free the housing from the lock stile.

Once they're off, the screws for the mortise should then be exposed. Simply remove the four screws holding the assembly in place and it should come right out.

To install the new one, just reverse the process.

Hopefully this information helps, but please feel free to reach out if we can be of any further assistance.

Quick Learner from Wantage NJ

Aug 24, 2019 12:10 pm

Trim piece. How do I access screws to get this off? Is white vinyl stuck on with adhesive covering wood? A return spring is shot in mechanism it seems so each time I need to close door fully I must use finger to push the catch piece down. It sucks. A simple spring broken or repairable? I want to take out to look at. I'm a locksmith from years past. Maybe an easy fix? Suggestions? I don't want to chew up door taking apart...

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Dave Sr. from SWISCO

Sep 3, 2019 7:49 am

I've never personally dealt with this trim piece, but I've seen it from other customers a few times in the past. From what I've been told, you have to pry that tab off at the top and bottom near the opening. Just be careful not to pry with too much force; these are plastic and there is a risk that they'll break. You want to use firm, but careful, force.

Quick Learner from Wantage NJ

Sep 11, 2019 4:10 pm

Dave Sr.
Thanks for your reply. That smaller white trim piece around latch opening I did have out. It. Carefully pries out. It's there to just dress up the edge of the hole for the mortised latch assembly. When it's out you still can't see any way (screws) to remove latch assembly. (the 82-247 part) I guess I need to try prying off whole edge trim piece from the top down. Hopefully I won't crack it. It appears to maybe be held in place with adhesive but I'd hope not. Replacing whole door is not an option, (as per Tom's reply to another customer) that's ridiculous. I'll see what happens. Thanks again. Mike

Professional from ashland, ma

Feb 27, 2023 12:17 pm

after you remove the handles and pop out the insert covering the internal lock, you now have to remove the white metal flange on the end of the of the door. beginning from the black rubber weather strip on the inside of the door, where it meets the white metal piece covering the end of the door, you gently pry that off with a small prybar or flathead screwdriver. youll have to work the whole way up as it is also snapped in on the outside. as you gently pry the inside loose from the groove, give it a few taps on the end of the door to loosen the outside catch. then you will see more of how it needs to be peeled off. after it is removed, the screws will be accessible to then remove and access the lock mechanism. the process to put it back together takes a few minutes. the end flange should snap right back into place, with some potential for slight rebending if needed.

Quick Learner from Minnesota

May 15, 2026 7:05 pm

Does anyone have any photos to help show what "professional from Ashland" is describing in this thread. I think I understand but a few pictures would help!

Handy Person from Missouri

Jun 25, 2026 8:49 pm

Thanks for all this info. Combining the threads from 2013, 2019, and 2026, it sounds like the detailed steps for removing the Pella mortise lock mechanism (Swisco part 82-247) are:
1) Remove the door handles
2) Carefully pry off the small trim piece around the latch opening
3) From the interior side of the door (the weatherstripping side), working bottom to top, carefully pry off the long white metal trim covering the door's lock edge
4) Unscrew several screws, now exposed, to remove the long wooden piece ("lock housing cover"?) covering the door's lock stile
5) Unscrew 4 screws, now exposed, to remove the mortise lock
Is this correct?

Handy Person from Missouri

Jun 25, 2026 9:20 pm

Pictures to go with previous post, mostly from two helpful youtube videos:
https://www.youtube.com/watch?v=CfScxfrqiLE (remove handles)
https://www.youtube.com/watch?v=1N9RA6NzM0M (remove lock stile trim and lock housing cover)

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Home Owner from Texas

Jul 13, 2026 2:59 pm

I had an issue where the door did not close. I noticed that when I pushed down on the latch there was some slack and so it was not extending all the way. I was about ready to remove the metal trim without a clear understanding of how I would get the trim back in place. Its frustrating how Pella designed this because there is no easy way to access the lock and this is an expensive door.
Close inspection showed that the metal trim on the door was misaligned. This pushed up the plastic trim piece so that the latch could not extend to its open position. The fix was to remove the plastic trim and cut out a notch to make space for the latch.

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