Thank you, I'm also considering this since I'm not entirely sure I am right.
Thank you so much, where did you even get this from? I'm not entirely sure to be honest, I looked at the drivers footwell to see if it is around there and I saw something similar to the component listed on the diagram you posted with number 87106J, perhaps that means I have dual zone climate? I'm not sure because I didn't see anywhere that it has dual zone.
I'm also not entirely sure what it may be, I assume that mech/flap component you mention is in charge of changing the airflow depending on the mode you set it in? (I.e to the feet or face) because that works, it's simply that the 2 vents on the driver side don't blow cold air, but the passenger side is all nice and cold when you put the AC on. It also makes a small noise at first, I will see if I can record a video of that.