2011 5t gas furnace upflow closet. Expired manufacturer warranty. Indoor unit: Filter replaced - 5". Drain clear. Blower - motor has visible oil streaks. Evidence of history of replacement. Heatexchanger - rust found in the bend, may crack next heating season. Evaporator coil - oil streaks present, rust present, dirty intake. A courtesy leak detection discovered refrigerant molecules entering into breathable air. Supply plenum - biological growth present. TESP - manufacturer specifications indicate .15inWC and the tested total External Static Pressure is 0.62 which indicates undersized duct system. Condenser unit: not serviced for 3y per homeowner. Washed airflow restricted coil to allow proper heat rejection. Condenser fan capacitor below manufacturer tolerance - failing. Compressor inrush amperage exceeds manufacturer specifications - irreversible damage. History of capacitor replacements. Refrigerant charge - all data revealed high superheat and low subcool which indicates low cha