Doesnt blow out the vent very well - Splendide 2100XC

check the controller an vacuum lines

usually a faulty blend door under the dash

blend door might need to be replaced

make him do it again... ?

Sounds like a blend door problem. The vacuum from the engine opens and closes the door that directs air flow thru the vents.
I would guess the door is stuck in the middle of the range or something is blocking it.
The blend door(s) is behind the glove box.

No good answer here.... A Terazza has a different type of system and this problem is very common for this model.
Any answers at all for the Terazza or Uplander??
My Uplander has the same issue...No Blocked vents. Just no air out top vents. Bottom discharge only.

It could be your heating coil. It seems that your fan is running (at least to the outside vents). Since your temp. is fine there is probable not a problem with your coolant. As far as it not blowing through the vents in the middle couldn't tell you.

if it blows out the top vents but not the floor, it is most likely the blend door actuator.

take the dash off to see if the vents are connected to the dash. if not, the heat from the engine is blowing through the open hole

disconnected or cracked vent tubes