I have been having serious AC problems. I bought my car new and I am at about 40K miles. About 6 weeks ago I heard some light fluttering in the AC I turned it off and then on again and it was fine but about an hour later the engine was pouring with smoke. I took it in for the warranty and they were on back order?? But they did get the unit and fixed it HOWEVER - about once a week I have to take it back in because it starts to blow warm air. Today it was cold all day - then at the hottest point of the day (a mild 85 degrees) it started blowing warm air. After my appointment - it was back to normal cold air. Anyone else seeing this? 03 CTS first production run 5 spd?