Performed two system heating maintenance Attic furnace: 2003 Trane single stage 80% efficient furnace Replaced 20x25x4 filter Pulled and cleaned flame sensor Cleared pressure switch port Blower wheel and motor in OK condition Blower capacitor in spec Gas pressure 3.5"wc Temperature rise within specification range No signs of condensate drain issues related to air conditioning season No concerns found with this furnace Basement furnace 2003 Trane single stage 80% efficient furnace 20x25x1 Filter is new Pulled and cleaned flame sensor Cleared pressure switch port Blower wheel is a little dirty, but not to the point of causing an issue with operation Blower capacitor is in spec Gas pressure 3.5"wc Temperature rise within specification range No signs of water leaks from cooling season No concerns found with this Furnace Both furnaces are operating within factory specifications at this time