Tech arrived at a 2 system tuneup. Upon inspection, the capacitors were within specs. The upstairs system contactor was buzzing loudly. The condenser coils were hosed off to assist with air flow across the coils. The box filters were allowing unfiltered air to enter the system. The kitchen system drain line was draining slowly and the pan drain terminates uphill. The upstairs evaporator coil was dirty. The system was functioning upon departure. He decided to replace the contactor, clean the coil and add treatment strips to help keep the drain system clean. The first contactor replacement was faulty and another was added. The items were installed and functional. The customer will revist other recommendations in the future. The systems were functioning upon departure.