hot air blowing through vents
I have hot air blowing inside/under the dashboard of my truck
if I turn the AC on or the heater the only thing I get is Hot air everywhere( the vent selector is pointing at. If I turn the heater or AC off, the hot air comes in only under the dashboard (right on the feet vent) the faster I go on the truck the more hot air that is coming in.
does anybody have any idea what could be happening?
how can I fix this?
I am not so good with electrical but I have a feeling this is not electrical.
any help will be really appreciated.
1998 Ford Ranger XLT 3.0 v6