I replaced the air filter with one provided by the customer. Indoor and outdoor coils are clean. I noticed that the ductwork needs to be cleaned and sanitized. I checked the electrical wiring and electrical systems, all are within specification. I cleaned the condensate pan and drain lines and ran hot water to flush the debris and to check for proper drainage without leaks. I recommend adding a wet switch or other condensate overflow safety device. I operated the unit on cooling mode and recorded 20+ degree delta temperatures across the evaporator coil. I checked refrigerant pressures and they were normal. Unit operating normal.