Hey all,

So on my 1998 Mustang, my heater/AC only blows out of my defrost vent, all the time (Even when I don't have it on). It doesn't blow out of the dash vents at all. I have temperature control and the different intensity settings work fine when I have the AC on, but even when the AC is off, it will let air out of the defrost vents at the temperature that is selected.

Let me know if I need to clarify or give more information, it may be abit confusing, but I tried to explain as best I could!

How can I get my system back the way it should be?

Problem solved, turned out to be a vacuum leak.