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Percolating boiler, can't seem to bleed air out.

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Posted by Matt on February 04, 2004 at 07:34:24:

I have a 2 yr old Weil-McClain 104,000 BTU boiler.
Lately it percolates,pops, and pings loudly inside the boiler only, and only during the time that the burners are on. It will ping and pop for a few seconds after gas shuts off, but not for long. If you stand near the boiler it seems that the noises are inside the area where the "heat exchanger" is. I have read and followed the link posted here about bleeding air from the system. Also I have installed a Taco air scoop with a autovent on top of it, and I also have an autovent coming off the top of the boiler. I have found no air in any of the three zones ( used the bleeders near the baseboards), and the boiler is heating just fine, its the noise that bothers me and is pretty iritating at 3 am. Thanks for any thoughts !


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