Ask any driver here in the Valley Of The Sun what the most important feature is on their car and many would probably answer, “My air conditioning!” It might be hard to argue that point. 🙂 A lot goes into delivering ice cold air when you push that A/C button, or hot air for that matter. That’s when the HVAC system in your car kicks in. Most HVAC concerns occur when you least expect it, and often at the most inconvenient times.