here's my story near the end of this heating season, my outdoor econoburn suddenly sprung 2 pin hole leaks in the rear wall. This unit is 5 years old and has otherwise been fine. Zero problems. Had a welder apply 2 patches over the holes and when I was refilling the boiler, immediately 2 more pin holes leaks started, this time in the front wall. All of these leaks were inside the upper chamber and are located at very specific spots. The spots are part of a perfect circle, where the inner jacket is welded to the outer jacket, I've heard them called "lugs" but I'm not sure what the proper term is. Because the upper chamber has a small access door and the leaks are on the front wall, the welder couldn't reach around to get at them. We even tried using a mirror inside the chamber, so that he could see where to weld. No luck. Presumably this is corrosion related? I thought getting a closed boiler system like econoburn would've minimized corrosion. Needless to say I am disappointed that this has occurred, as I was hoping to get at least 10 years out of it. My neighbors older non-gasser, open system, central boiler has lasted 11 yrs! I spoke with Dale at econoburn and they say that I have to ship it to them in order for them to see if it can be repaired, and to see if it would be warrantied. From the discussion it was not clear how they judge whether they would warranty the problem. I checked what shipping fees would be with a local shipping company and it was about $1500, each way. Dale mentioned talking with a company called Fastenal to see if they would do it cheaper, which I have yet to do, but I'm doubtful. I will call them regardless. My concern is that I spend money to ship it back, and they find they can't repair it or that they won't warranty it. this being my first boiler I'm not familiar with these kinds of problems/repairs. Is it worth the risk? or is it likely that I would be throwing away money? If they just throw some patches on there will it just form new leaks next season, etc? I know its hard to answer but I would appreciate any opinions.