HVAC tune up in Dunwoody. Tested operation of 1 system. Discovered blower wheel dirty, outdoor coil extremely dirty, system is acting like it is overcharged but could be because the coil is so dirty which is putting a lot of stress on the compressor, system needs a compressor saver hard start kit to reduce stress on compressor and reduce energy consumption on start up which will extend the life of the system. All other components tested within normal manufacturing spec. Ultraviolet light system is recommended to combat organic and viral growth in systems and throughout the home. System cooling at this time. Water heater is almost 12 years old with typical life span of a tank water heater is 10-11 years. Replacement should be highly considered to prevent water damage. Signed up for maintenance membership. Cleaned outdoor coil and pressures are normal now.