So, furnace got red tagged yesterday. It had been tripping off on a safety, that turned out to be a plugged combustion intake (some little critter). But the heat exchanger is cracked so they had to shut it down, turn off the gas and take a picture. I had to turn the gas back on and restart it. It’s 20 years old, so past the expected useful life. Still need to get it replaced.
That sucks. I am amazed my furnace heat ex hadn’t failed. The unit is like 60 some years old. I get it inspected occasionally and it’s become a joke at the HVAC company I work with. It might outlive all of us old guys.