I'm getting my temperature Blend Control Motor replaced tomorrow (2016MKZ), and it seems as if the dealer gave my the correct part (GS7Z-19E616-B). My left side temp does not blow cold but the right side does. I'll know soon if the repair is correct. Based on what I've seen the Vent Door motor is the one on the right side behind the radio stack to the left of the glovebox. That's the one that controls the upper, mid, lower vent controls. There's videos on youtube and it's been a common Ford issue. There are videos for the Fusion, Edge, and Explorers. The explorer seems to locate them differently.