I own a 2005 Land Cruiser Prado VX, 6 Cylinder, Automatic
i have been having this problem with my Air Conditioner for quite a few days. It blows warm air through 3 vents in the front. But cold air from it's middle vent ( the one to the right of the center console ) I tried to repair the problem with refilling the AC gas. But to no avail. It was good for 3 days and then back to warm air again.
Probably a stuck blend door, but adding refrigerant that way can also cause problems, the system is designed to hold a precise charge of refrigerant and over filling can do harm to the system, I would recommend that you get the system checked out by a certified A/C tech and get the refrigerant charge corrected and then get the blend door looked at.