2 system ac tune up complete. Left behind replacement filters. Cleared drain lines. Tested mechanical and electrical components. Found downstairs system with very rusty, corroded evaporator coil, likely to leak. Found upstairs blower capacitor to be weak (10 uf), recommend repair. Found downstairs blower capacitor to be weak (5 uf). Found downstairs dual capacitor to be weak (30/5 uf). Due to age and condition of downstairs system, recommend upgrading system to a more reliable, more efficient system. Downstairs system runs on r22 which is a refrigerant that has been phased out by the epa. Systems are cooling at this time.