1 system ac tune up complete. Changed filter and added a nice citrus scent to it to bring a little extra freshness to the house. Found very rusty evap coil. Added chlorine tablets to evap coil drain pan. Found air escaping through hole where suction line and liquid line enter evap coil door, sealed it with caulk to stop airflow loss and increase airflow to house. Found high amp draw going to compressor and fan. Found worn voltage distribution system, recommend repair. Due to age and condition of system, recommend upgrading to a more reliable, more efficient system. If customer wants to make system last as long as possible, recommend repair on voltage distribution system and a performance enhancement kit to take a load off of the compressor. Found no surge protection, recommend adding on to protect unit from lightning strikes and power surges. Chemically washed gathers condenser coil and applied rust proof waxing. Refrigerant levels are good. System operating at this time.