Upon arrival to scheduled system maintenance I was shown to an A/H unit located in the attic. Immediately pulled off panel doors to inspect all electrical components connections, collect electrical readings off all components, and check the evap coil for cleanliness. Evaporation coil is clean and all electrical components connections are fully secure with readings all within range of factory specifications. This system is equipped with a Pure Air X UV, which is fully functional at this time. This system is also equipped with an elite UV system which is needing a bulb replacement. Homeowner agreed and is moving forward with quoted work at a later date. Collected a temperature, differential at the air handler between supply and return sides of the unit and had a 23° temperature differential in the cooling mode. Tested float, safety switch, and ensure proper functions. Changed two customer supplied return air filters. The homeowner was curious about the benefits of the Pure Air elect