Just replaced the heater core and all that. Now put everything back together but when I choose different selections as in like vent, windshield floor setting ect it doesnt really change anything. I feel air coming from all everywhere no matter were i put the selector. Any clues?

 

Do you have cables to open or change the mode doors or vacuum?

 

Yep, if your selctions are changed via vacuum lines, then you most likely pulled them loose during your change out.

 

+1 on the vacuum line... its always helpful to post what your vehicle is too

 

I got it. Thanks for the help.