Upon arrival to the scheduled system maintenance, I was shown to the a/h in the bedroom closet and c/u on the side of the home. This system was installed In 2015. I pulled off the panel door to inspect all electrical components connections, collect amp draw/voltage readings off electrical equipment, and check the unit for cleanliness. The a/h unit has minimal biological growth. It has a UV light system to keep the unit clean. The customer will wait to replace the bulb until it burns out. The evaporator coil and blower fan are clean. The d/t temperature was 20° and within normal range. One thermostat wire was exposed and I put a cap back on the orange thermostat wire. All electrical components are secure and within factory range. I then vacuumed the condensate drain line to remove and blockage or debris. I ensured this was draining properly and flushed with a gallon of water. The filter was clean and does not need replacement at this time. The c/u system refrigerant charge is within