At the start of the recent warm weather I started using my air con for the first time since I bought my car, a 2008 sport back. The problem I had was that it blows hot like a hair dryer for 40-45 min and then cools down to what would feel like a standard desk fan, no icy coldness just a fan really.
I took it to my local garage who drained and refilled it but it was still the same, I took it back today (2weeks later) and they did the same again, they said they both over and under filled it but still no joy. It's just the same, hot air then just a fan.
Ive run a scan through my VCDS and there's no fault that I would accociate with it, it shows I have a prob with my boot light and radio but also that I need to change a spark plug.
Any ideas what could cause this?
Thanks in advance....