On arrival system was running and cooling producing a 17 degree delta. Indoor unit was clean and the drain lines flowed when flushed. Outdoor unit passed all electrical testing. I recommended an improved uv system to improve air quality and decrease maintance, a whole home surge protector to protect both the hvac system and the home, and a duct cleaning. Customer would like to receive a call and schedule me back out in September to do the whole home surge protector and duct cleaning.