STU complete and thorough evaluation. Indoor unit: Customer replaces 1inch filters every 3 months. 2012 4 ton HP r410a. Second stage electric heatstrips OHMs 2ithing tolerance. Electrical wiring tightned. Blower Motor inspected: no biological growth found inside cabin after last level 2 duct cleaning with Microbial spray. Blower wheel clean. Evaporator coil: clean, slight rust and questionable spots, due to age I performed a courtesy leak detection and found leaks. Drain line clear. DeltaT 11.8. Outdoor unit. Coils clean. 50/5 dual run capacitor within tolerance. Condenser fan motor sounds compromised (motor bearings). Harsh compressor sound on startup. Electrical connections tightned. Refrigerant: r410a - indoor has a fixed metering device meaning we consider Superheat. Per data tag on unit from manufacturer, my superheat is higher than specifications. Confirming leak detected in the evaporator coil. I expressed all of my findings to the customer. Customer explained that ab