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11-05-2009, 08:14 PM
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#1
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Home Slave
Join Date: Oct 2009
Location: Lewiston, Maine
Posts: 26
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Rumble from furnace!
I have a oil burning-hot water heating furnace that is original to my house(1985). Lately I have noticed that when the furnace shuts down after a heating cycle, there is a loud rumble that shakes the house. It never has done this in the few months that we lived here until a couple of weeks ago. Is this a sign that this thing is on its way out or ready to explode and kill us all? Really would like some input.
Thanks.
PS. I do plan to call a few places about this as well if it keeps up.
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11-05-2009, 08:46 PM
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#2
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old pro
Join Date: Nov 2008
Location: Winnipeg, Canada
Posts: 1,663
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Get it checked by a Pro ASAP. Rumbling is usually caused by unburnt oil in the combustion chamber burning badly after the burner shuts off. Usually caused by a dirty or dripping nozzle. It is very unsafe as well and can produce CO if not setup properly.
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11-05-2009, 08:51 PM
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#3
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An old Tradesmen
Join Date: Oct 2008
Location: Lanc PA
Posts: 3,691
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Quote:
Originally Posted by yuri
Get it checked by a Pro ASAP. Rumbling is usually caused by unburnt oil in the combustion chamber burning badly after the burner shuts off. Usually caused by a dirty or dripping nozzle. It is very unsafe as well and can produce CO if not setup properly.
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I was going to type a long response.
But instead. I'll just quote Yuri's again. 
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11-06-2009, 05:42 PM
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#4
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Home Slave
Join Date: Oct 2009
Location: Lewiston, Maine
Posts: 26
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Hmm... maybe this will be grounds to getting it replaced? It's within our first year here and if this furnace is a failure, we get a new one under warranty with a $75 deductible.
So is this problem likely to cause a catastrophic meltdown and catch fire?
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11-06-2009, 06:00 PM
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#5
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An old Tradesmen
Join Date: Oct 2008
Location: Lanc PA
Posts: 3,691
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Quote:
Originally Posted by Lazy_Jake
Hmm... maybe this will be grounds to getting it replaced? It's within our first year here and if this furnace is a failure, we get a new one under warranty with a $75 deductible.
So is this problem likely to cause a catastrophic meltdown and catch fire?
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Left to continue to operate like it is. It could do major damage to your home, and or your family.
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11-06-2009, 06:24 PM
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#6
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old pro
Join Date: Nov 2008
Location: Winnipeg, Canada
Posts: 1,663
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You may not be alive to enjoy your new free boiler. 
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11-06-2009, 09:52 PM
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#7
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Home Slave
Join Date: Oct 2009
Location: Lewiston, Maine
Posts: 26
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Point taken. I will call ASAP, even though it will cost me $300 just for a call. Insignificant compared to what I could lose.
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11-06-2009, 09:55 PM
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#8
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old pro
Join Date: Nov 2008
Location: Winnipeg, Canada
Posts: 1,663
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May just need a new nozzle and call chg. I would however have it properly cleaned as it is sooted up now and setup properly so it is efficient. Unless you "like" supporting the oil companies or the guys with camels.
Last edited by yuri; 11-06-2009 at 09:59 PM.
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11-06-2009, 10:21 PM
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#9
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Home Slave
Join Date: Oct 2009
Location: Lewiston, Maine
Posts: 26
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Is cleaning these nozzles doable by a DIY'er? Soak 'em in Marvel Mystery Oil or something? 
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11-06-2009, 10:40 PM
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#10
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old pro
Join Date: Nov 2008
Location: Winnipeg, Canada
Posts: 1,663
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Not cleanable and I always put a new one in every year. The burner should be setup after the boiler is cleaned by using a combustion analyzer.
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11-06-2009, 11:03 PM
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#11
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An old Tradesmen
Join Date: Oct 2008
Location: Lanc PA
Posts: 3,691
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Yea.
Cleaning small nozzles is not practical. And you could end up that it stops making the noise.
But, unknown to you. The nozzle could still be spraying a bad pattern. And still cause a lot of harm.
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11-07-2009, 12:46 AM
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#12
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Newbie
Join Date: Apr 2008
Posts: 11
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I would also check for a stuck oil valve. It may not be closing after the burner shuts off.
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