2005 ranger edge 3L, blend door stopped working, door is good, new or old actuator will not work,, hvac heat switch replaced (center knob), checked all connectors,they look good, does seem like DC power is at actuator, heat/ac works great, using a actuator part I have rigged a rod to get either heat or ac (but nothing inbetween) wondering if the ac/vent position switch is tied in the system.(right side knob).trired of battling this,,