Performed heating maintenance on a 2019 Trane two stage 80% efficient natural gas furnace 20x24x1 filter is new today Blower wheel is clean Pulled flame sensor and cleaned Modified thermostat wiring to allow thermostat to control furnace heat staging. Also set dip switches on control board for no time delay on a 2nd stage call for heat Run tested furnace High fire gas pressure set to 3.5"wc Temperature rise 44⁰ Low fire gas pressure set to 1.7"wc Temperature rise 46⁰ Temperature rise specification range is 35-65⁰ Furnace is in great shape and operating perfectly within manufacturer's specifications at this time