Just as a tip ... when going down the road in hot weather, make sure the cab ventilation knob is set to "MIX" when the air conditioning is running.
In the MIX position cold air does not come out at all directly on you from the chest-high dash vents. The cold air comes out split between the defrost vents and down unto the floor to cool both the driver's and passenger's feet. The air from the defrost vents follows the windshield up and then comes down to gently bathe the entire cab area. This takes about 10 minutes to begin to feel comfortable and you should have the fan speed knob on high settings - 3 or 4. You feel no direct blasts of cold air - only a cool cab area everywhere in it.