I have a 93 240sx fastback and whenever i have my temperature console thing to whatever i want(or don't want), and keep it off(you know, don't give it any power to pump A/C or heater), it still blows cool or hot air softly. Can I fix this because when I want to stay room temperature, it keeps on blowing hot or cold air. I guess it's not much of a problem, I can always set it to the middle, but if anyone knows, please help me out. Sorry this post is full of references to "things" and whatnot, but sorry. My vocabulary is very limited haahah. Spank you:D

Check and make sure your fresh air lever is set to the rec. position. If not this allows air to come in the fresh air vent.

Could you say how to do this? Mine's doing the same thing, and while I'm pretty sure its not lethal, it is mildly annoying.

If you have the system set to take in fresh air it will allow a small amount to continue flowing even if the blower is off

super diagram #1:

hope that kinda helps or clears it up