how to install an actulator

or a power lock actuator ?

blend air actuator

Is the problem you are having switching from heat to cold or redirecting the air to another direction, like defrost, floor, chest level, etc?

big job!

www.youtube.com/watch?v=g-36aM360V8 --- check this out

redirecting the air to another direction

If memory serves, the know directing the air in other directions is a vacuum system, not electric with a motor. I'm trying to work from memory here, so remove the glovebox, it should be two screws. You may see the vacuum lines once the box is removed. I believe all the connections are to the right near the door. There may be a hub there. One should be the vacuum line. If I am rememvering correctly. You may have a crimped line or one with a hole in it.

http://www.heatertreater.net/videos.html#explorer

helps when auto zone gives you the right part!