It’s time to do the spring test run of your air conditioner to be sure everything is working properly. It is important to do this now before the hot season begins and the A/C service people become swamped and unavailable. Service the air handler, install fresh filters if needed and turn the A/C to its “on” position. Let the system run for an hour to make sure the system is producing cold air and there is proper air flow to each room. If not, call your service people and get an appointment to repair the system.