Complete 2 system a/c repair and preventative maintenance check. checked electrical, mechanical components dusted electrical cabinets, cleared drain line, changed filters supplied by the client. Found the main floor to have dirty blower wheel recommend to pull and clean. Found dirty evaporator coil recommends cleaning. Found no water safety recommend adding a wet switch and back up water safety. Found upstairs system to have dirty blower wheel recommend to pull and clean. Found dirty evaporator coil recommends cleaning. Found no water safety recommend adding pan switch and back up water safety switch. Found system low on refrigerant recommends performing leak search. Upstairs system r22 from 1996 recommends a comfort advisor to come out and talk about replacement/update. Systems are operating and cooling to the best of ability at this time.