In the last couple weeks (when we have had warm days) my a/c doesnt seem as cool, -- or that it takes a while to get cool. I dont have any awful howling or sounds.

This morning as I was driving the slide indicator for temperature was almost to the very left side (coldest setting) blowing just cool air. When I slid the indicator all the way to the left, then the fan sped up blowing hard, but move it a 1/4 inch to the right the fan slows down to a trickle.

Compressor going out? Temp sensors? Eh?