I replaced the air filter with one provided by the customer. I cleaned the condensate pan and drain lines and ran hot water to flush the debris and to make sure it drained properly without leaks. I checked the electrical wiring and electrical systems, all are within specification. Contactor and Capacitor were replaced last year and a Hard Start Kit is already installed. I operated the unit on cooling mode and had 20+ degree delta temperatures across the evaporator coil. Refrigerant Superheat of 8-10 degrees. Unit operating normal.