Service diagnostic found that the evaporator coil and air handler were dirty. The system was performing poorly. I checked for leaks on the system and did not find any leaks. Options for repair were presented to the homeowner and he chose to have the air handler and evaporator coil cleaned. I cleaned the evaporator coil and air handler. I also sealed around the outside of the air handler with hard cast tape. I function tested the system and the system was running at the completion of service.