Ac maintenance in loganville. Tested operation of 2 systems. Discovered downstairs system with failed blower motor, organic growth in system which is a high respiratory irritant, dirty blower wheel, no drain line water safety, weak compressor starter, pitted main electrical switch and missing line set insulation. Discovered upstairs system with pitted main electrical switch, no drain line water safety, missing line set insulation, dirty blower wheel, system low on charge. Performed leak search and detected leak at indoor coil. Systems are 18 years old and replacement is HIGHLY recommended.