I know there have been posts on this before as I've searched the forum before for this topic. Long story short I want to make sure I have the correct part I need. PN:68004016AA. This part number is for the heater blend door actuator. When I turn my heater control switch to floor hot air blows out the defrost. No obvious signs of a vacuum leak anywhere that I can see in the engine bay. All other hvac controls function (fan speed, temperature). I crawled underneath to get a look at both actuators it appears the top one is the culprit of my problem but I'm just not sure. Bottom line is I either have air from the front vent or defrost. No floor, floor/face, or floor/defrost. Am I on the right track replacing this part or no? I live in Alaska so no heat on my toes is killer on long drives. Any help would be much appreciated. Thanks guys