Completed heating maintenance on an 80% efficiency trane furnace Vacuum, brushed and cleaned furnace cabinet. Sanded and cleaned flame sensor and inspected hot surface igniter. Both are in good condition with little wear. It is recommend to have the igniter replaced customer was sent an estimate via email. Removed all burner assembly brush and cleaned. Inspected and tighten all electrical connections. Inspected flue exhaust no leaks or cracks. Replaced air filter size 14x24x1 provided by homeowner. Fired up furnace and checked all operations on system. Unit is operation properly at this time. https://visionshare.xoi.io/?id=ms7e4e3163-575d-i184-4d4a4523adf0-uF83-8dba34e96927