Performed maintenance on a home with 2 systems. Upstairs unit is a carrier. Thus was was chemically washed today. Electrical components were checked and verified in good working order. Refrigerant levels are good. Condensate lines in the attic were cleared but did have visible water around the area. Recommending an overflow switch on this system. Downstairs unit was chemically washed. All electrical components are working within range at thus time.filters are clean and customer changes them often. Systems are operational.