It’s important to have your cooling system maintained annually—it will run more efficiently and need fewer repairs if you keep it clean. We’ll also inspect it, inside and out, and make any small adjustments or repairs needed to prevent a sudden failure later in the season. For central air, schedule service in spring, once outside temperatures reach 75 degrees Fahrenheit. If you use a heat pump to cool your home, it should be at least 65 degrees for the most effective annual maintenance.