A broken capacitor is the most typical AC repair in the Coachella Valley.
To check yours, find your outside unit (condenser) and inspect it if your thermostat appears to be operating properly but the air coming from your vents is simply not cold. The fan motor and the compressor are the two parts. Both are audible to a trained ear. The compressor is like a deep buzz, like a refrigerator running, and the fan naturally makes a whirring noise. Your hand should feel warmer than the ambient air when you hold it above the fan. There is a good chance that your capacitor is damaged if the outside unit is buzzing or humming but nothing is turning or blowing.