Dual HVAC controls not working

[ssteiger]

It is hot outside. I get into my 2003 explorer and put the ac to max recerculate, dual temp settings to 72F each or single setting to 72. After the AC system has a couple minutes to cool down I feel hot air coming out the driver side and the cold air coming out the passenger side and rear AC. As the car cools down I realize the driver side is just recerculating the air from inside the car and not passing the air through the evaporator. I have tried reducing the driver side to 60 but still no change. I looked under the passenger side dash at all the colored vacuum lines (i assume controling the vents) and all seem to be in perfect condition. Is there a common problem i should be looking at? Suggestions?

 

[ssteiger]

After further research and tearing the dash half way down, it sounds like a blend door actuator not working or the blend door is broken. What i can't figure out is since one side is working properly, does this mean there are 2 blend doors?