Help!! A/C broken in Arizona!!

Last night I woke up hot, and realized the a/c was off. The fan wasn't even blowing. It was totally dead. So I turned it to the off setting. In the morning we turned it back to on and it started again. No problem. We left for a few hours, came back, and turned the set temperature down a bit, and as I pushed the slider down it shut off. We have tried replacing the fuse in the thermostat, checked the breaker box, checked the unit on the roof and the blade spins freely, and actually replaced the thermostat too. Still nothing. No heat, no fan, no a/c. And were in Arizona heading to the grand canyon today!! There are no repair shops open til Monday! Any ideas?