2005 Hummer H2 Q&A
2005 Hummer H2 Question: driver side vents will only blow hot air. no matter what setting on controls?
could be an actuator or the door is broken - goodguy
theres a blend door actuator thats bad (to the right of drivers foot , when on the gas pedal) it is simple but awkward to replace and special attention need be paid during install so it's 'timed' right. - Jason Skinkle
One or more heater & AC (HVAC) temperature and/or air delivery mode door actuator may fail, resulting in improper temperature or air delivery. If this occurs, fault code(s) should be stored...