I was trying to trouble shoot (or at least looking at things) I noticed that this “pink” armed actuator doesn’t move at all, and I think it may the cause of my problems. Can anyone identify this part? I cant upload pics from my iPhone

or i would share the pic!
I did note that the faint amount of air i can feel moving does change temperature as i move from low temps to High, Which leads me to believe that the temperature control flap is working.
Is there anyone who can provide some assistance, I have searched high and low, and i doubt that this could be a problem that hasn’t been encountered before.
Thanks