Membership maintenance. 2 yr old AMANA split system- straight cool Check refrigerant pressures and temperatures. Levels indicate possible low refrigerant charge. Condenser coil is clear and has no corrosion. Took compressor and outdoor fan motor amp draw. tested capacitor microfarad. Blower wheel is clean. Evaporator coil is impacted with dust/debris. Some biological growth found on evaporator coil plastics, and blower motor wiring. Took temperature split at supply and return Plenum. Vacuumed and flushed drain line with 1.5 L of water. Tested float. Small air leak at back of air handler connection to Plenum. Homeowner decided to move forward with evaporator coil, clean in place. Used tarp to cover bottom of return box. Cleaned evaporator coil from top and bottom with foam coil cleaner. Rinsed the evaporator coil thoroughly with water after cleaning. Vacuumed drain pan after cleaning to remove excess water in float switch. Insured system start up after cleaning. Used spray glue and mast