bigjoe

i currently have a 01 expedition and last year while my friend was installing my system unpluged the heating vacuum out from the vacuum under the dash. he just simply ran a new vacuum wire from the outside of my car to where the heat should be coming out of and ran it down to under neath the drivers wheel to the vaccum that the old one was to. now my heating is making a little whistling noise here and there and the heat isnt coming out that warm its pretty cold but warm not hot liek it used to be. how can i fix this? and is there a way i can get the old vacuum hooked back up instead of using a vacuum run across under the hood of the car?

and also the back air doesnt really work that well either it is quite cold