An AC tune-up involves a thorough inspection and maintenance of your air conditioning system to ensure it runs efficiently and reliably. This includes cleaning or replacing air filters, checking thermostat settings, cleaning evaporator and condenser coils, inspecting and tightening electrical connections, lubricating moving parts, adjusting refrigerant levels, checking ductwork for leaks, testing system controls, clearing the condensate drain, and verifying overall system performance. Regular tune-ups help prevent unexpected breakdowns, extend the unit's lifespan, and maintain energy efficiency, ultimately saving on repair costs and energy bills.