Any Climate Control guru's?

[tbenesch]

2002 X5 4.4L. Just got back from the beach and had to experience driving in hot and humid weather with a climate control issue and was hoping someone might shed some light. We had the AC on and it was blowing nicely and cold. Then I noticed that the air wasn't coming out of the vent as much as it previously did. The fan is still going strong, but only a slight amount of air was coming out of the vent (although it was cold air). I had replaced the Final Stage Resistor (2nd time) just before we took off to the beach as I thought that was the culprit. So the fan works fine (I can hear it going to town full on), the air that does escape from the vents is cold, so the AC portion works. I just don't know much about what the climate control does. Is there something behind the vents that closes/opens to allow the air to come through the vents? Is there a fuse that I can take out that will allow me to manually control the air? This is really irking me and I'm at a loss on how this whole thing works. The rear vents don't even emit a breeze although the fan is going full blast. There's something there that is restricting the air from escaping and if I can only find it to open it up.... Thanks for any insight. This is an intermittent problem. When I restart the car, the fan is blowing hard and cold.