Hi all, I noticed today that the air conditioning in my car isn't very effective, which I guess could be a number of things, but that the air coming out of the vents on the passenger side was much colder than it was on the drivers side. I set the temp to "LO" and also to Auto, as this seems to give the best cooling. Is there a likely or well known cause for this? I have read about the HVAC valves getting stuck, but this seems to cause hot air to be blown in the cabin at all times, and I don't have that problem. Can anyone suggest anything? Thanks.