Why heat exchanger on Noritz N 063 is leaking?
by Ronald C.
I have my tankless for seven years and it has worked very well. However it has just failed badly. It started leaking at the heat exchanger and dripped down onto the control board and killed it.
Afer replacing it with the same but new model NR71. Once removed I looked down the flu duct and I could see a lot of green crusty corrosion around the vain of the tubes inside. I have found some vague notes about produce an acid compound that can corrode the flue in searches I have done. What is about liquid propane that causes that? Can I stop it?