I feel for you . I'm in North Phoenix. Check underneath the windshield washer resevoir . There is (for some reason) two connectors within a foot of each other before the wire goes into the firewall. Mine gets disconnected almost every time I change my plugs(i never learn...). If it's not that, you're probably low on freon. The system has and auto shut-off for when the system gets too low to prevent the compressor from burning out. Just check all of the electrical connections to the compressor.