AC problems on 07 GS
 

Hey, I just bought a 07 GS and did not test out the AC well enough. When the fan speed is set to 1 or 2 there is no air blowing but on 3, 4, and 5 air blows properly. The AC light only will only stay on in the first position that does not circulate the air, any other fan speed and the light goes off and does NOT blink. After turning the fan speed to 3 or greater after running it on 1 with AC the air will be briefly cold then quickly warm up again after the cool air clears the system. Any ideas?