Sometimes it doesn't. Ran with the windows down all day today but did try the a/c several times....no worky! Workedthing this morning. So got stopped tonight and it works. But only for about 5-10 minutes. Gradually got warmer air. Any suggestions?
Many factors, Low Refrigerant, bad signal/pressure switch, Clogged lines etc...
I'd suggest you start with checking Refrigerant first! Sounds like you need to add bottle or two, and make sure you add some dye in case there is a leak.