Performed cooling maintenance on a Bryant AC system Changed 20x25x4 filter with a customer-provided one Tested i-wave air purifier Blower is clean Drain is clear No signs of water leakage inside the furnace from heating season Tore down and washed outdoor unit Tested capacitor Checked refrigerant charge Added small amount of R410a refrigerant to get 8⁰ subcool on the liquid line System is in great shape and operating within factory specifications at this time