Does any one else have this problem? When the a/c is not on and in "outside" position my vents smell like mildew...I have changed the a/c filter but it still stinks..Only smells when using fresh air..Smell goes away the minute I turn a/c on..

 

There's a product that you can spray to fix that. I don't know the name of it. Maybe somone else will chime in.

 

Do a search on this in the SC300/400 forum, you will find a lot of info.