[ta6point6]

I have this weird aftermarket set up on my truck that I did not get complete. My AC controls look like this with a small vent up top, not mine just a picture from the internet. The thermostatic switch that controls min-max air sits underneath it so does the fan switch. In the back of panel that I got from the local junkyard there was just a big vent hose that attaches to the back of AC controls. Will the thermostatic AC switch be affected by cold air being blown over it? Should I fab up some kind of narrow vent tube that just directs air through the vent or will this be affected at all?

[Goatracer1]

AC air should be dry air. The evaporator should remove the humidity from the air going over it before it gets to your switch. That's why there is a drain tube from the evaporator housing to the outside of the car.