Cars with "Dual" hvac systems(passenger side temp control) use electronic actuators to direct air flow. Many times actuators will set error codes - door position does not match commanded. So check for codes. Daddylac sounds like mode actuator concern - it can be somewhat viewed above gas pedal. Dash will have to be repositioned or removed to replaced. Temp actuators can be replaced by removing passenger side hush panel and glove box. Older models (non Dual) use vacuum systems and temp issues tend to center around air flow blockage or low coolant / restricted heater core. A/C - low freon.
It will be OK