2015 4t carrier hp attic horizontal. Expired manufacturer warranty. Filters changed x2. History of drain blockage. Float switch is in emergency pan and not inline with the primary condensate line. Blower wheel has slight buildup. UV system has done a decent job on maintaining cleanliness. Evaporator coil has heavy rust and refrigerant molecules detected indicating a leak of refrigerant. Heavy biological growth present inside supply plenum where duct board is. Supply plenum design is questionable. No disconnect at the outdoor unit. Compressor inrush amperage exceeds manufacturer specifications. Refrigerant charge is below manufacturer specifications. Dual run, customer supplied capacitor fan side is above manufacturer tolerance. Homeowner was by my side, I took the time to educate, explain and address the discrepancies I discovered. Due to the age, performance and safety of the system, homeowner agreed to discuss with a CA 5/6/25 @4p about replacement. We spoke about keeping the exist