Performed preventative maintenance on the system. Cleaned drain, changed filter, checked coils, tested/inspected all electrical components, checked refrigerant pressures, and tested operation of the system as a whole in both heating and cooling modes. The outdoor fan capacitor was weak we changed that and the superset compressor one out to one of the turbo x 5 year warranty ones. I also noticed a fair amount of biological growth forming in the air handler. We installed a Pure Air X germicidal UV air purification system and wiped the inside of the unit down to take care of this. The unit and UV Light is currently operating correctly in both heating and cooling modes. Customer would like a receipt mailed because he doesn’t use email.