When I start my vehicle to let it warm up the heater blows hot air and it blows it like it should on high, but when I drive down the highway for about twenty to thirty miles and go to turn the fan up, it barely pushes any air out. I can hear it blowing under the passenger dashboard, but there is barely any air coming out of the vents. It does not have a problem heating. It only happens when I am driving down the highway for a ways. I have cleaned the in cab filter but have not tried anything else. When I pull the filter out and turn the fan up it blows air out of the filter a lot good, but when I put it back together it still does not push any air out of the vents, does not work on floor, front vents, defrost, and also does not work on recirculate.
Dec 11, 2016 at 4:51 AM
