Scheduled maintenance cooling tune up on a Trane air conditioner completed. I visually inspected the furnace. Checked voltage and amps. I inspected the evaporator coil. I checked the compressor and they customer needs replacement, so they had me replace. I checked the temperature difference across the coil. Checked refrigerant charge, voltages and amps. Found those to be low so I added coolant. I rinsed the condenser coils with water. Cycled and monitored the system. Operating normally at this time.
