Arrived onsite for heating issue. Customer noticed the furnace flue pipe running hotter than normal. Also, notice water from the drain line for the humidifier and combustion drain. Performed diagnostic. Found the system running as it should. The flue pipe is at 415 degree which is on the higher temperature side but within manufacturer’s requirements. Temperature rise of the system is 50 degree. Also within manufacturers requirements. I added foil tape to the flue seam where the previous tape was. Observed upon entering the water heater dripping from the pressure relief valve. Also confirmed the expansion tank is bad and full of water. Will provide estimate for repair. Also, Recommend having a chimney company perform an inspection to see why the flue pipe is hotter than normal.
