heater/ac control knob quit last night!
 

This is on a 03 blazer....

The switch that controls the fan direction quit working on me. It is the one on the far right, turns ac to face, feet, feet/defrost, etc...

I normally leave it on feet/defrost all the time....but I switched it to face because I just left the store and had milk and ice cream on my pass floor....so it was for good reason!

But now it won't switch to anything else?
If I turn it all the way to off, it does turn off though?

Im curious if this is an easy fix or am I gonna be screwed by taking out my dash??

There are a few wrecking yards I could get switch panels from, but I don't wanna just start replacing things not knowing??

Thanks for your answers ahead of time!

***ps....my other heater switches work fine...speed and temp controls....