2022 Lenox 10 seer 3 ton r410a cooling system preventive maintenance inspection, tune up, and cleaning Replace 16x25x1 air filter already on site and perform minor modifications to the very tight filter slot, visually inspect evaporator coil, clean and flush evaporator drain pan and drain lines with p-trap, run test single stage cooling at 53° f supply temperature. Test run all equipment and cooling mode on the outdoor unit, inspect 370 vac power supply and starting relay. Water flush condenser coil and run test refrigerant pressures 129 and 369 with 15 subcooling and 17 superheat All equipment is clean safe and ready for summer Homeowner will reset the 66° test temperature on the thermostat