No heat for driver on my wife's 2008 LTD (dual climate control) as well. The problem is no air flow to the driver's footwell, thus no heat. We live in Winnipeg, Manitoba, Canada, so the heat is greatly needed!
I'm going to try to gain access to the left actuator and blend door and see if I can manually get some air flow to the left lower area. If I can do that, then I know there is hope. Haha!
Big question: is the actuator on the left side of the center area (above where the accelerator pedal is) the correct one for this, or should I be concentrating on something else?