Depends a bit on what you have set for cabin temperature. For a test, try setting the cabin temperature really low, and see if the delivered air is much colder. If not, it does suggest that the aircon compressor may be a bit low on gas. A scan by VCDS would also be a good idea, just to check if all is OK. If this is the first time you have asked for cold air this year, it may take a little time for the system to stabilize. If you only ask for a cool cabin temperature, the system will mix cold air with warm outside air. Good luck.