There is a problem with my audi a6 A/C. There is no cool air, just hot air.. ECON light is always ON, even I filled a month ago with refrigerant. Also when I try to start A/C the noise of vehicle don't change that it used to do 2 months before, so I think the A/C fan isn't working. Could you please help me what should I do, and do you know where is the problem? PS. sorry for my bad English!! Thank you very much!