Upon arrival to the scheduled system maintenance, I was shown to the a/h in the bedroom attic and c/u on the side of the home. 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 had biological growth. I recommend a UV light system to keep the unit clean and produce better indoor air quality. The evaporator coil and blower fan are clean. The d/t temperature was 15° and within normal range. Photos uploaded to ST. All electrical components were secure and within factory range. I then vacuumed the condensate drain line to remove and blockage or debris. I ensured this was draining properly. The c/u system refrigerant charge is on point and within normal range and all electrical components are secure. I collected amp draw/voltage readings and the 40/5 capacitor was low with a 36/4 reading. I explained to the customer that this is low and not within factor