Hvac tune up in Brasleton, Georgia. One system. Changed filters. Tested mechanical and electrical components. Found system with only one form of water protection, recommend adding addition water safety switch in drain line to shut system off as a safety in case drain line backs up. Found system with weak outdoor fan capacitor. Found system with electrical pitting present on main electrical switch. Recommend repair. System has no hard start kit, recommend installing hard start kit to take a load off of compressor so it starts smoother, runs smoother, and therefore lasts longer. Recommend installing surge protection to protect equipment from power surges. System is operating at this time.