During a tune-up, all the components are inspected and serviced so they operate properly and at peak efficiency, saving money in utility costs. Dirt is the nemesis of an efficient air conditioner. As dust infiltrates the cabinet, building upon interior components, a gray mat can form on the fins of the cooling coil. As the cooling coil becomes blocked, the airflow across the coil is reduced, leading to reduced cooling capability. Once airflow is slowed, the coil may actually become so cold that the condensate forming on its surfaces freezes, totally blocking the coil.

Keep in mind, cooling equipment of any age may present safety hazards, particularly if a certified technician has not serviced the system regularly. Decomposing animals, insect colonies, and bacteria are a few of the things that can be hidden in the inner workings of a split system air conditioning unit. If left unchecked, this can allow bacteria into the home where it is inhaled, resulting in infections and health problems. Fatigue, coughing, sore throat and respiratory tract infections can be attributed to the circulation of airborne bacteria and fungi in poorly-maintained cooling systems.