Servicing has one primary function: to keep your AC functioning at its peak by catching small problems before they turn into big ones. Without maintenance, blockages can cause overheating, which can burn out expensive parts. You might also suffer from leakages and power malfunctions. The latter can cause skyrocketing utility bills that can cost more than the routine service you’ve been avoiding. Dirty blowers are power-hungry and prone to failure. Clogged filters can collect allergens that are harmful to your health. Clogged evaporator coils are even more destructive. When they’re dirty enough to restrict airflow, mold and mildew can proliferate, destroying the quality of your indoor air.