Air conditionning issue

The heat in that vehicle is controlled by a blend door that regulates heated air flow. it is operated by an electric motor/actuator. The problem can be that the actuator is stripped or inoperative or the door itself could be damaged. This is what needs to be determined by examining the actuator and see if it is responding to heat change commands or not.

I am afraid that on your vehicle the right side actuator is a little hard to access but not impossible. You have to remove the Audio Control Module (radio) to gain access.