heat exchangers

Quote:

---

Originally Posted by Glenn Harrison

I just attended their class this fall as well. I was shocked with some of the things they have found with tubular heat exchanger's, as well as some very new condensing furnaces failing.

---

Just curious, what were the failures on tubular heat exchangers? I have only seen two failed. (excluding Carrier RTUs, which are pretty much all failed)

Quote:

---

Originally Posted by craig1

Just curious, what were the failures on tubular heat exchangers? I have only seen two failed. (excluding Carrier RTUs, which are pretty much all failed)

---

On residential the crimps are coming apart, where the tubes are crimped into the face plate, or as an example when you go from the larger tubes into the transition box and into the smaller tubes, those crimps are coming loose, and in some cases you can pull the tube(s) completely out of the faceplate or transition box.