I have an issue with my '04 Suburban pumping out hot air on the driver's side only. Sometimes it'll flip to cold, sometimes it won't. I've replaced the air valve, but to no avail. Is replacing the head unit the next logical
I'm just wondering why a state of charge would affect the blend door actuator. Air is ice cold everywhere else in the car. So, my question remains, is the blend door actuator controlled by the HVAC head unit or another computer in the vehicle?