Membership maintenance. 12 yr old ream split system. C/U- breaker style disconnect is very old and rusted. High voltage whip connector is loose possibly broken. Turbo 200 capacitor microfarad reading is good. Contactor is pitted loud buzzing noise. Took an on the compressor and fan motor. Checked refrigerant pressures and temperatures. The system is cooling, but could be running more efficiently. Condenser coil and all metal parts are rusting/corroded. Filter dryer is rusted. Condenser is on roof. A/H- interior is clean and free of biological growth. Blower fan wheel has dust buildup. Condensate drain line is clear. The homeowner has a schedule to flush this line with vinegar and water. While performing maintenance today, I noticed the pure air ballast did not have a Lit blue indicator light. Restored power to the system with the door off to verify power in the UV bulb. The UV light did not come on. Tested for power and checked all wiring connections from source to UV light. No issues