6.4L A/C blowing hot air!

[travsap]

Hey Guys, I have an 08' 6.4L F350 that I just picked up yesterday. Ironically the A/C seemed to work great driving it home for 3 hours, but today it is blowing hot air? Anyone have any suggestions where to start? Where is the LOW line to check level myself? Same as other "little" vehicles? Please help! I'm sweating here!
Thanks
Travsap

 

[02Oilburner]

Id take it back if you got it at the dealership!

 

[travsap]

NO warranty!! Just my luck!

 

[WD40]

Welcome to SSD.com
If no warranty, find a good shop that does AC work that you trust. You must of got it
from a person, I thought dealers had to give you at least a 7 day warranty?
Doug