I own a 2006 Q7 and have had it with the air con. The passenger side blows hot air despite set to low. I have changed the temp motor and the heat regualtor(looks blue at top and has some kind of aluminium radiator ribbing). Still I have the same hot air blowing. The flap motor seems to be changing, I can hear it when I turn the temp to cold, but the air remains hot. Anyone faced this same issue???

Just to mention, it's just the main vents on the passenger side, the glove box vent is blowing cold air, setting it on auto somehow stops the vents on the passenger side blowing anything.