Crack in my gas furnace heat exchanger
I have a natural gas furnace. I have just been told by the service tech that I have a large crack in my heat exchanger. He recommended I not run this one anymore and replace the unit immediately and gave me a cost. I don't think this has just happened, but how dangerous is it to continue to run this one. I really had not planned on replacing the furnace right now as we are in the process of moving soon.