Hello, looking for solution to no heat in cabin driver's side on 2008 Ram 1500. Have heat on passenger side. Following suggestions, I've already flushed the core, changed coolant, burped the system, checked coolant level, changed the blend door actuator, verified blend doors are not broken, and all that is good. I did see that the blend door rod that operates the two doors does not move when switched. The rod moves fine manually. Anyone familliar?