Ok I have the same weak fan issues, after reading many of the posts I decided to take a look myself.
The fan is located behind the glovebox, If your glove box is overloaded this may sow down the air intake.
If not here is what you need to do.
1.Empty the golvebox, on the floor is fine.
2.on the right side of the glovebox is a string that acts like a door opener........carefully unhook it there is an oblong hole for this purpose.
3.now you will need to remove the box as you open it it will stop on 2 plastic pegs one on the right and one on the left,
flex the carefully flex the box inwardon both sides so the box opens allthe way to the floor, it will come of its hinges thats ok.
4.You have read that there is a filter location there is no filter but there is a screen we will remove the screen.
on the fan housing behind the glovebox you just removed there is a tab toward the left side you will press this tab and remove this little plastic cover from left and the right side just slides in.
5. once this is removed there is a screen just like in your dryer slide this out and remove all the lint, get it all or after you install it it will blow all over your car.
there is writing on the screen to tell you wich side goes in first.
Once this is cleaned put it all together like you took it apart in reverse order.
[[][Do not use force on any of the steps and no tools required]
This worked for me the AC one again blows like it should
if you have weak blower problems this will remedy it.
Remember there is not a filter its a screen.
good luck,
No fix for the vents
