When I originally bought my 2006 LS cobalt (used), of course the air conditioner was working great. 4 days later I wreck it and destroyed the original ac unit.. I got my car back and it was working great. I had to recharge it once but for about 3 months everything was fine. I got in my car one day and it just never turned back on. Nothing was blowing out of the vents, however when I would get on the highway or go above about 40mph a very very slight amount of air will blow out. I have control whether it is hot or cold, if it goes on defrost, I can also use my electric rear defroster just fine. Just no air actually coming out of the vents. I took it to a different shop because I moved out of state so I voided the original warranty on the replacement unit. My air conditioner stop working again about a week later, we took it back and got it fixed again and then finally 6 months after that it stopped working and has not been fixed. I have been told it is a bad blower, but I have also been told it was the Climate Control Unit.. which allows the nobs to do its job. If I have control of the coldness/ heat and everything does this mean it's probably a bad blower?