A/C Issues...

[RSVX]

OK, here is the deal.

I turn on my A/C one day and the fan stayed on its lowest possible speed, no cool air comes out etc... temp set @ 68*

I put the fan on high, some thing, only there is fast air and nothing cool/cold. Temp still set @ 68*

Turn the temp up to 85* and the A/C fan kicks in trying to compensate and starts heating the car. Slowly lower the temp and the fan speed slows.

Checked all fuses related to the A/C, all good.

Swaped A/C Relay with another relay,repeated the above steps, still nothing...

A/C belt under the hood in tact and spining, compressor belt "wheel" is spinning as well.

This leaves me to one choice... I need a re-charge... would this be a pretty accurate trouble-shooting job? And would a low ammount of A/C coolant/freon/whatever it is now cause the above symptoms?