View visual findings from this job here - https://visionshare.xoi.io/?id=XA-A243-C8F3B2D2697F40B0B28465CBEE572BE8 Preform maintenance on (2) 90% gas fired forced air furnaces with (2) 16x20x4 air filters: Replaced and dated air filters in both basement and attic furnaces open blower and furnace cabinet doors and removed from unit removed flame sensors and hot surface igniters cleaned flame sensors with copper bristle brush and polished with steel wool inspected both hot surface igniters- okay blew out and dusted furnace cabinet and components clean and clear blew out and dusted blower cabinet and components clean and clear secured / inspected and checked all electrical wiring, connections and components polished and wipe down inside of furnace cabinets and components blew out and flushed condensate drainage on systems inspected inducer motor / assembly and venting off both systems replaced (2) AAA batteries in both first and second floor thermostats call for heating on thermostats