Came out today to perform three system HVAC home care. Upon arrival, inspected the upstairs system. Found that the blower wheel was dirty, the indoor coil had biological growth and rust spots, the heat exchanger has rust spots, the condenser for that unit is low on R 22 refrigerant, there was no UV protection, the return Plenum was starting to separate from the furnace , there was no filter rack for that furnace, causing the filter to press up against the blower wheel. Upon further inspection of the basement system found that it had no UV protection and everything else was running properly. Upon inspecting the main floor system found that the system had no UV protection, replaced the April air 413 filter and everything was running properly for both the indoor and outdoor system. Also adjusted gas pressures on all systems to factory recommended 3.5. Customer is setting up a date to get quote to update the upstairs system.