Door latch

Yes, the adjustments can cause the latch not to work when it is hot or cold but it can be a defective latch as well.

Here are some diagrams for the mechanism so you can check it out:

Rotate lock - 1 - around.
Engage retainer - 2 - by rotating in - direction of arrow a -.
Remove retainer - 2 - from mount.
Swivel cable - 3 - in - direction of arrow b - and remove cable nipple - 4 - from eyelet - 5.

You will need to remove the door panel here is a guide that will give you an idea on how to do it.

https://www.2carpros.com/articles/door-panel-removal

Check out the diagrams (below).

Please let us know what you find. We are interested to see what it is.

Cheers, Ken