The air conditioning on my B6 Passat never worked as expected ever since I bought it new in 2006. It has a climate control where I set the temperature to LO (lowest setting) and depending on the outside/inside temperature, it can take up to about 30 minutes before I start noticing somewhat colder air coming from the blowers, but not cold at all. Basically, if it's 80 degrees outside, the blowing air will be quite hot for about 20-30 minutes, I even have to open windows to get that air out, then it will get a little cooler, but still almost hot. It only lasts for a minute or two before it goes back to very hot. The temperature keeps fluctuating from very hot to hot and maybe sometimes warm, but never cold.
I had this checked a number of times by a couple of dealer service centers and another independent repair shop; they all say it works the way it's supposed to. But I know it's not! It's useless the way it is. Just recently I had the air conditioner maintenance service done and nothing has changed. Any other car I have ever driven, including my previous Golf, Jetta, and my other new Jetta, they all good air conditioning that would blow freezing air within a minute regardless of how hot the outside temperature is.
I love my Passat and I never really had any other issues with it, but I feel hopeless with this one and I'm hoping to find a solution for this problem.