Completed warranty repair on Lennox gas furnace. Part covered, labor was not. Completed preventative maintenance on the system after repair. 16x25x1 air filter was changed by the homeowner. Completed humidifier service and replaced #35 water panel. It’s likely the panel was not changed since installation (09/07/2016). Verified proper drainage as it was leaking before the panel was replaced. System is currently operating properly and ready for the season. Lennox M#SL280UH110V60C-04, S#5916H14205. Filter-16x25x1, Humidifier-#35 panel in Fall.