I have a 2004 Lexus ES330 with 129k miles on it. I live in Houston, so it's HOT! Recently, the driver side A/C vents started blowing warm air (like would blow when the A/C is off), while the passenger side vents continue to blow cool air. The left middle vent and driver side door vent are warm, while the right middle vent and passenger side air vent blows cool.
Any ideas what this could be? I would like to have an idea before I take it in. I like this car and I'm not ready for them to tell me my A/C has died!