I have a peugeot 206 glx model 2002.This last week i have noticed my air vents where my heating comes through, get really hot after i have been driving for a while. I dont have my heating on , and the temperature gauge stays around 90. i can actually feel the heat when i put my hand or face near it. I am not too sure, but i also smell a kind of burning/stagnant smell also. Any one any ideas what this could be? Like i say, i definately dont have my heating on and all 4 of the air vent grills are very hot.