AC was working great, then one day only cold air coming from top vents and hot air coming from floor vents. Thinking that the a/c not working good I re-charged the a/c and same thing before. It was cold cold cold, then one day one of my heater hoses picked up a leak. I replace the hose and some days after I notice this problem started. I would like to know what it is and how to solve this problem. Other than that my car is a great car rides nice runs great.