Performed heating maintenance on a 2018 96% efficient AirEase (lennox) two stage natural gas furnace 20x25x4 filter is new today Blower in OK conditiom Aprilaire 600 humidifier #35 water panel is in good condition Set humidity to 40% Opened bypass damper No water leaks present during humidifier operation at this time Pulled flame sensor and cleaned Fixed loose ground wire to burner box Blew out condensate lines Run tested furnace High fire gas pressure set to 3.5"wc with reference to the sealed burner box Temperature rise 55⁰ Low fire gas pressure 1.7"wc Temp rise 46⁰ Furnace is operating within factory specifications at this time