1 system cooling pm check complete. Left replacement filters. Cleared drain line. Tested mechanical and electrical components. Found evaporator coil to be very rusty and corroded and therefore likely to leak. System has no hard start kit, recommend adding on to reduce load on compressor so it starts smoother, runs smoother and therefore lasts longer. System has no surge protection, recommend adding on to protect equipment from power surges. System is cooling at this time.