OK, checked my service book. Your new Yorker the blend door actuator is easier to get to than it was on my car. Should be above the exhaust hump under the bottom of the HVAC box in the car. You'll need to remove the floor vents to get to it according to my book. The procedure to check on that fault is to remove the actuator, run system ad observe if the actuator responds, also check to see if the door can be moved by hand and isn't binding. After that it is checking continuity of your wiring. Let me know I could probably scan the pages for you.