Performed heating maintenance on a 2021 Carrier 2 stage 96% efficient natural gas furnace Replaced 20x25x4 filter with the gold plan provided filter Replaced aprilaire 600 humidifier #35 water panel Washed humidifier tray Cleared hard water blockage from distributor tube Set water flow at the control valve above the water heater Tested operation: no water leaks, operating properly at this time Pulled flame sensor and cleaned Condensate trap is clear Burners in great shape, no rust Blower in good shape Set airflow for efficiency speeds Intake and exhaust pipes are in good shape, no signs of leaks High fire gas pressure set to 3.2"wc, Temperature rise 60⁰ Low fire gas pressure set to 1.3"wc, temperature rise 52⁰ No concerns found on today's visit