So I'm having this same problem. Driver's side on full heat, passenger side normal.2009+ F150 Passenger Side Upper Temprature Blend Door Actuator Replacement
Here is the updated actuator I used, you can buy it here-http://www.amazon.com/gp/product/B00OAKGWNA/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeA...www.youtube.com
2009+ F150 Drivers Side Lower Temprature Blend Door Actuator Replacement Without Removing Dash
Here is the updated actuator I used, you can buy it here-http://www.amazon.com/gp/product/B00OAKGWNA/ref=as_li_tl?ie=UTF8&camp=1789&creative=390957&creativeA...www.youtube.com
Trying to understand how this works. So there's an actuator for each side, for the temperature control. Then there must be another one for position? Defrost, face vents, floor?
Am I correct that I'm looking at replacing the difficult one under the dash?