Got an sc400. Went to go run errand and my a/c wasn't blowing nearly as hard as it usually does nor is it as cold as it should be. I'd assume it just might need a recharge, but when I turn the a/c on the rpms don't do that slight jump that the idle regulator normally does when you turn the a/c on. I'm sure this has happened to some of you. So am I looking at just needing a simple recharge or could it be something more problematic?