Performed heating maintenance Stainless burners are spotless Pulled and cleaned flame sensor Blew out Condensate trap Vacuumed return, filter cabinet, and furnace blower cabinet Wired 2nd stage heat to zone panel, programmed 20min staging delay Run tested heat High fire 3.5"wc gas pressure temperature rise 45⁰ with both zones open Low fire gas pressure 1.9" Temperature rise 42⁰ No concerns found on today's visit