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Posted by Harold hydronicnetwork.net on January 21, 2004 at 18:12:44:
In Reply to: boiler puffing black smoke out of flue posted by J. on January 21, 2004 at 16:52:46:
Yes, you did many of the mechanical things to get the parts nice and clean. Now you need to do the combustion testing that professionals do to get the correct air/fuel mixture adjustments. That is too lengthy to teach without hands-on training and you don't have the instruments. Time to call a pro.
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