All of the blend door actuators are vacuum controlled so if all of them are not working I would look for broken vacuum lines (small) under the hood that go from the engine to the fire wall.
Here is a guide that will help:
Check out the images (below). Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.
Image (Click to make bigger)
Tuesday, May 30th, 2023 AT 5:34 PM