<ul><li><a href="http://forums.audiworld.com/a4/msgs/1713652.phtml">Help a 20v'er out?</a></li></ul>

That 2 pipes connect to the evaporator which means that it is located under the dashboard.

It is not a very difficult joh, but it is a pain. well, I guess no pain no gain. No money = pain too =)

Get your car check for leaks, it costs around $110 (recharge + leak test + tax). They won't recharge it if you don't perform a leak test.

I guess many 12v audi have evaporator "the evil" problems. Go to A/C shop, they'll be able to tell you what is wrong.

...temp sensor located under my passenger headlight first as it may have been damaged during my FMIC install when I removed my bumper and headlights. It is somehow related to the A/C system according to a fellow AW member.

If I can prevent spending any $$$ at all, I'll try that first.

He mentioned a pressure sensor. The only sensor I see in my manual is a temp sensor on the dryer.