UPON ARRIVAL TO THIS HOME IN BLACK CANTON CITY, AZ i REPLACED 20x20 INTAKE FILTER. CYCLED SYSTEM. FOUND UNIT LOW ON CHARGE, 82/160 psig. INSPECTED SYSTEM FOR VISIBLE LEAKS. INDOOR COIL IS HEAVILY WORN. WOULD RECOMMEND REPAIRING LEAK WHEN LOOKING OVER PREVIOUS WORK WE RECOMMENDED HAVING LEAK REPAIRED IN 2018 AS WELL.