Danny, I would suspect the blend door is not operating properly. If your system is anyhting like my 300D there is a flap on top of the heaterbox that appears to direct air across the top toward the heater or through the evaporator. You should be able to get to this by going through the glovebox if you remove it. I had similat symptoms and this is where I'd look next, Your system pressures should be giving you some cold air by now!