Im looking at buing a r53 GP. All is looking fine, but its only blowing hot air from the vents. Beeing a GP it has the manual climate control.

I can hear the ac running if I turn it on and the air feels dryer. The air seemes to be hotter than the outside and it feels like its on heat even if i turn the **** all the way to cold. Turning it to hot gives even hotter air, so the **** is doing something.

Is there a known problem regarding this matter? My guess would be that something is broken so that the heat can not be turned off. Its not just the ac not working, the air is really heated.