I performed two system ac tune up, one downstairs and one upstairs. I performed condenser flush / cleaning of condenser coils only. I evaluated both systems, tested refrigerant levels and tested electrical components. Upstairs System- Everything is working to manufacture specs at this time. The system is showing signs of wear and tear over the years. The system is also past its life expectancy. I would think about upgrading this system before it goes. Downstairs system- The electrical components all tested good. But the refrigerant levels are way off. I diagnosed that the condenser coils are going out along with the evaporator coil is showing signs of restriction. This system is past its life expectancy. At this time I would Consider upgrading the system to ensure cooling and heating operations without failure. Please call office if you would like a quote on upgrading system.