Armstrong Ultra SX90 heat exchanger rivets
I was just informed by my HVAC guy that my 10 yr old Armstrong Ultra SX90 furnace has popped a rivet on the heat exchanger. He says he is seeing this more regularly with these furnaces. He said he can replace the heat exchanger and told me to think about replacing the whole furnace because in the long run it may be cheaper than fixing all the problems. Sounds like he's trying to make some money off someone who doesn't know any better. Just wondering if this rivet problem is common on the 10 yr old Armstrong furnaces like he says?
Thanks!