I have a 2009 model and the air conditioner is blowing hot air, the compressor is running and i can put my hand on the low pressure freon line under the bonnet just in front of the passenger seat and the line is very cold. This indicates that the AC system itself is operating well but there must be a flapper valve (or something similar) in the air ducting that direct airflow either over the AC coil or over the heater coil. Seems like my car isn't changing the air flow to go over the AC coil. Is it a fuse, a control unit, the devise that actuates the valve? i am at a loss where to even start looking. can anyone here help with some troubleshooting?