Not good being hot in summer

I have a 2001 chevy impala. I turned my air conditioner on and on the passenger side the air blow cold and on the driver side the air blows warm what the world never had this problem before. can someone help me figure this issue out. I had my system charged in 2010 broke my ankle in 2011 and by the time i was walking it was winter again. so this is the first time i have used the air in 2012. Thank you D:screwy:

Did they fix the leak or just charge the system?

Is this a dual system(seperate passenger and driver temp controls)?

If no, then you are low on freon.....

If yes, then you have to check the operation of the two temp actuators....if both ok, then low on freon.....