Hello, I have a trouble with climate control on my audi when I trying to adjust the temperature on the left side it's all right, but the right-hand side completely disobeys just blowing cold air, but the most interesting thing is that when you put the temperature on the right side to the MAX and reinsert the climate control connection and then turn on climate control starts to blow warm air but when you adjust the temperature, starts to blow cold air. I tried to change the Climate control but it doesn't helped.

Also I done diagnostics and got the following error:

00819 - High Pressure Sensor G65 - here this is probably due to the A/C because it's not working for me.
01592 - Air Quality Sensor G238 - And because of this I am not sure, so maybe this is the problem? I want to find out before buying, because this sensor costs 70 pounds. I was find out what he doing, he checks the toxins in the air that is blown into the cabin, perhaps due to the fact that he dead and cabin valves closed, but otherwise should closed both sides or not?

Thank you

Audi A6(c5) 1,9TDI 2003.

And Fellas, sorry about my poor English :////