If you don't have air-conditioning, you can try these four things to get it going again before having to call a pro.
no ac four things you can do before calling a pro number one replace or clean that air filter i know you think you just replaced it but that thing's old and needs to be replaced number two replace the batteries and your thermostat if they've gotten low the thermostat may still appear to be functional but it's not number three reset the breaker in your electric panel number four shop vac the drain as it comes out of your house a float switch could be stopping your system from working.