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Munchkin heat exchanger problems
heat exchanger quite closely on one of the failed ones. I would definately say it is the fireside. Caused by pitting from the iron deposits I think. When we clean the Munchies you find that their is corrosion under the iron build up on the heat x. It gets kinda rough on surface of stainless where the iron deposit adheres to the metal. My first failure was I think over a year ago and was only in for 2 or so years. It had failed on the inside of condensate collector pan, looked like again where iron deposits were sitting on stainless pan and corroded out through under small coffee ground deposit. I feel the grade of stainless, (I am not a metallurgist) is the main problem. Just a guess but I think a good pot shot. Also it's design allows for debris to sit in bottom of heat x and then gets moist from condensate formation and I think exacerbates corrosion. My nickels worth, Tim