Originally Posted by hayden802
I'm just wondering everybody's thoughts leaving the AC on when you shut the car off/being on when you restart the car. My dad always made sure the air was off before he shut the car off so naturally I do the same. But I've always thought the majority of car owners did that. Recently I've noticed not that many people (at least people that I know) don't really worry about it. Is there advantages to doing so or am I just being overly cautious?
Running the A/C creates condensation all throughout the system, and if it's not dried out, you develop mildew and the nasty smell that goes along with it.
What you're "supposed" to do is turn your A/C off a few minutes before you shut the car off, so that the vents and what not can dry out. If that's what you're saying you do, then yes there is an advantage to doing that.
If you're saying you shut it off just moments before turning the car off, then no there is no benefit to that. It's no different than just leaving it on.