Bubble noise from furnace itself

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Old 01-04-14, 09:35 AM
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Bubble noise from furnace itself

I have a hot water furnace that is making bubble sounds. The pipes to the different zones do not make any noise, just the furnace itself when it is firing. I just had the expansion take, a circuit board in the furnace, a valve and gauge replaced by a licsenced plumber. I used to have bubble noise at the garage heater and the plumber said it is piped backwards but have been told that in the past by another outfit. This is the first I have had bubble noises directly from the furnace. Do all four zones need to be flushed again or is there something different with the noise coming from the furnace itself? thnx
 
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Old 01-04-14, 02:47 PM
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Sounds like 'kettling' caused by sediment in the boiler.
 
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Old 01-05-14, 12:16 PM
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Kettling

So does this mean I have to flush the boiler or ?????
 
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Old 01-05-14, 12:50 PM
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A few of the guys on the forum have reported good results with the "Hydro-Solv" cleaners and inhibitors for the same problem.

Residential Hydronic Radiant | Rhomar Water Management, Inc.

Boiler Anti-Freeze, Boiler Treatment, Boiler Water Treatment Chemicals
 
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