Hi from aus I have an audi tt 8j coupe 2008 ,when i start the car up and turn on the fan I get a repeat burrup, burrup noise fron the heater area on the pass side of the car (left side ) were the heater is located .I have been unable to locate the noise or isolate it as the sound travels through the plastic houseing .bloody anoying .Some people say its a fan but I can`t see one It is not the main fan as i have checked it out . Has any one had this problem .Need help on this one Dan.