Tech performed service on (2) trane split systems. Found burnt/inoperative uv bulb on upstairs unit. Replaced uv bulb after customers approval. Tech recommended installation of plasma air purifier. Installed plasma air purifier on downstairs unit after customers approval. Tech found 45/5mfd capacitor for downstairs unit to be reading weak. Replaced dual run capacitor after customers approval. Customer stated would like tech to come for all future maintenances. Delta t is within specification and customer is satisfied with today’s service. Found no other challenges at todays visit.