Performed 2 cooling tune ups. Checked all major components and system operation. Flushed drain lines. Cleaned condenser coils. Recommend replacing upstairs air filters. Found upstairs blower is dirty, pulled and chemically cleaned it. Recommend Teflon treatment for both blowers and evaporator coils to maintain cleanliness. No surge protection, recommend power surge protectors to protect compressors and fan motors. One of the systems is not equipped with a start capacitor, recommend hard start kit for downstairs unit. The systems are operating properly at this time. Found downstairs air scrubber bulb burnt out prematurely, covered by manufacturer warranty. Replaced air scrubber bulb and filled out warranty claim form.