I have a 1998 Corvette with the typical hot/cold problem. Driver side blows hot, passenger side blows cool. It does not matter if the AC is on or off. I am sure this is the actuator or vent flap problem. Iam hoping someone has a diagram or could tell me how to close the flap to keep the heat out without removing the dash. I live in Florida so there is no need for the heat. I will do the full fix when I have the time and money I have just not been able to find a picture showing where the flaps are to make a temporary fix.
Thank you,
Jeremy

 

Have you checked to be sure your system is fully charged? What you describe is fairly common when the charge is low.