Jake Kring. 02-21-25. I arrived to reinspect a heat exchanger. I inspected the heat exchanger with the homeowner in the attic. We scoped the heat exchanger and found the heat exchanger to have excessive heat stress on the heat exchanger and where the metal has discolored has pitting and rust pockets that can completely fall through at anytime and cause a carbon monoxide leak. I recommend to replace the furnace and evaporator coil before this is a major issue with the furnace.