I also have a 2008 Grande...it does the same. Anyone who says that's a good thing has not encountered the problem, or is unsure of what cools down quicker. For those who think this is a good idea, imagine this, you get in your 60-70 deg Celsius car that has sat in the sun all day and it's 35 degrees outside, this smart car says I want to recirculate the 60-70 degrees instead of the 35 degrees outside- stupid. This is in Manual or Auto (remembering MAN/AUTO is for fan speed only- not temperature as some have eluded to). My wife and I try to remember this little design defect and quickly DESELECT recirculation. Should I find a fix for this I shall post..