I heard a click and clanking noise from the area below the center console when I was changing the A/C from "off" to "max A/C" this evening. Now I noticed that no air will come out the defrost vents when in defrost or floor & defrost mode. It seems like 90% of the air is blowing out the A/C vents, and about 10% is blowing out the floor vents. The amount of air blowing out doesn't change when you switch between modes. I found several threads about air only coming out the defrost, but I could only find one thread on this issue, but it wasn't very helpful. ETA: The best I can tell, no hot air will come out. I let the vehicle run for about 10 minutes with the temperature dial all the way to the right, and the air still felt just as cold as the outside. I do not notice any clicking noises when I switch from hot to cold. Can anyone offer some advice? Thanks.