The door that controls the air conditioning flow can be found near the fan blower motor. The fan blower motor is behind the dashboard on the passenger side of the car.
Inside the blower box, normally under glove box door, and under the dash, it is where the fan runs to blow air inside the car
The flap that directs sir to the selected vents is jammed or broken...or the switch that controls it is.
Under the heater controls thier is a flap slide you hand underneath you will feel the clips. bull the plastic forward ta dar
They are hydraulic. Most controls surfaces are hydraulic.
it could be your mud flap where the tyre is, the mus flap is located behind the bumper . underneath the arch
Aerodynamics
Under the left hand 'Smith' cover you should be able to see a small flap, sometimes this can be obscured by the GCV unit's venting pipes in which case just locate it by feeling around. Inside this flap is a button, push this and it will release the egr valve socket under the dash. The valve is in this.
In the bottom slot underneath the power button. There is a flap of some sort and as you put the plug in, the flap cover will open so you can plug in the controller.
I had the same issue with a clicking noise on the passenger side of the car, located somewhere under the dash. I pulled the dash apart and there is a motor located underneath the dash next to the vent that operates the flap on the floor to switch between pulling air from outside and circulating the air inside the cabin. That motor is stripped out and it's just freely spinning. It will require ALOT of digging in order to get to it, so I just left it.
Look behind the left front wheel, behind the mud flap.
pull out the ashtray next to the lighter, its under the rubber flap
It is inside the HCAV housing under the dash.