Complete 2 system a/c repair and preventative maintenance check. Cleaned outdoor coils and checked all components. All electrical components tested within normal manufacturing spec. The downstairs system is 28 years old and extremely inefficient, replacement is highly recommended. The upstairs system is extremely low on return with only 1-12" R6 return. The system needs return plenum and 2 additional return ducts to vents installed to provide proper efficiency and life of system. The system is also low on charge and leaking from the evaporator coil. Verified the part is covered under warranty but the labor is not