Performed heating maintenance on a Tempstar 96% efficient two stage natural gas furnace Pulled and cleaned flame sensor Pulled and flushed condensate trap Filter is good Blower OK Wiped down exterior High fire gas pressure set to 3.2"wc with a 58 degree temperature rise. Low fire gas pressure set to 1.3"wc with a 45 degree temperature rise. Furnace operating within factory specifications at this time.