I have an '99 A4 and I recently had my A/C Charged from a dealer(not an Audi Dealer). It still blows warm air. The compressor doesn't seem to be turning on although the belt (from what I can see) is. I was trying to read as much as possible on the forums about the Climate Control Codes but if I'm not mistaken you need the VAG-COM software? Also, I checked out the fuses to on the driver side dash. There aren't any fuses blown. Anyway I took it to Advance Auto Parts and they ran codes. They found that my catelytic converter and o2 sensor codes were coming up. Those are no big deal but I just want my A/C running. If you guys would be so kind as to help, it's very frustrating.

 

interesting post ill look later

 

Could be quite a few things. Wiring to the compressor clutch, the clutch itself, a pressure switch may have failed, a failed temp sensor, just to name a few.

 

Cool, thanks guys.