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11-23-2008, 09:19 AM #1
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Gurgling sound from central heat (gas)
About once or twice a day, when the central heat (natural gas) cycles off, a gurgling sound comes from the furnace area. Any ideas what this could be?
I'm not too smart on my HVAC system so it may be something I need to call a technician for.
Thanks
C
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11-23-2008, 09:35 AM #2
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What type of furnace do you have?
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11-23-2008, 10:44 AM #3
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Assuming it is forced air, not hydronic and it is 90%+ condensing type furnace, the noise most likely is the condensate drain system. If there is a self cleansing humidifier connected to the drain system and it's running, that could also account for the noise.
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11-23-2008, 01:26 PM #4
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If you have a 90+ furnace sounds like ,condensate pump running after furnace cycles off
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11-23-2008, 05:42 PM #5
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Its a Ducane. Not sure if it is 90% or not. Is this a problem I need to do something about?
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11-23-2008, 06:38 PM #6
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Could be a bad check valve at the disharge of the condensate pump letting water drain back into th pump.
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11-23-2008, 07:12 PM #7
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I would recommend having it checked by a knowledgable HVAC techncian. It could be just a condensate pump and that's not a problem. However it could also be a drain problem regardingn condensate from the furnace itself. Frequently when the furnace is involved, it's warning of a coming no heat situation. So have it checked just to be safe and possbily avoid an unanticiapted service call at some inopertune time.
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11-24-2008, 01:28 AM #8
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It sounds like a drainage problem to me also.
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11-24-2008, 06:31 AM #9
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Next time it runs , go outside and listen to the flue. Many times after installation if the flue pipe is not supported properly it can sag trapping moisture and making a gurgeling sound. Turn the furnace off at the switch and see if water returns from somewhere.
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