When I turn on the engine i notice that on the passenger side air vent hot air. The drivers side blows cold air. When I shut off the engine and wait an hour it sometimes works properly.
What causes the air vents in front to give cold air and hot air at the same time on 2003 Hummer H2
its the blend door actuator https://www.youtube.com/watch?v=5lnd8UNcx6M its the same on a cadillac escalade and a hummer h2 i had the same problem