Air not working....kind of

[billytheman1188]

im pissed, ive been looking for like 20 min to see if anyone else on here had this problem, i know people have because i remember seeing the thread but i cant find it now.

so my question is.....how do i fix my air?
when i turn the knob to the first dot----nothing
turn it to the second dot----nothing

then it starts working after the 2nd one.

is there a way to fix it so i can get air out of the vents on the first dot???? it used to work a few months ago, but then it just stopped.