Tip & How-To about 2004 Audi S4
It's normal. It's simply the air condensing when the water content in the air comes in contact with cold air. If you haven't been using your A/C much, some fungal residue may build. Possible solution is to the turn up the heat on the A/C and have it blasting to kill the bacteria that resides in your A/C vent system. Another suggestion is to turn your A/C off (i.e. leave the fan on but hit ECON to turn the compressor off) for the last 10-15 minutes of your trip. This allows the A/C components (duct-work, etc.) to warm up and for the condensation that forms on them to dry off (since there is still airflow 'cause you are still driving). This will limit the bacteria growth. It is especially important to do if you are going to be leaving your car parked for any length of time and/or it is humid out (more humidity = more condensation).
Posted by Lucas... on
May 20, 2013 | 1999 Dodge Caravan
Jun 09, 2012 | 2002 Audi A4
Jun 28, 2011 | 1995 Nissan Maxima
Sep 29, 2010 | 2005 Kia Spectra
Jul 06, 2009 | 1996 Honda Accord
1,149 people viewed this tip
Usually answered in minutes!