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Question DetailsAsked on 2/2/2018

exhaust fumes in only one room of the house which is over the furnace and water heater

gas company found 3 leaks; heating company fixed all; still exhaust/oil smell in bedroom over furnace/water heater; had all house vents & furnace blower cleaned; smell stronger but still only in one room; heating guys really feel not the furnace since it's only in one room.

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Unless you are getting both oil and also exhaust fumes from outside (car exhaust or flue gases from your or a neighbor's furnace), then has to be coming from the furnace/water heater unless you have other oil appliances it could be coming from, like stove or cryer or such.


Sounds DANGEROUS - remember if you can smell exhaust fumes, then you ARE being exposed to carbon monoxide and hazardous nitrous oxides - I would shut all the oil-burning appliances down till the source is fixed. Can be a real killer, because carbon monoxide makes you drowsy and therefore kills commonly while people are asleep - they go to bed and just don't wake up.


Smell around the appliances - but if you do not smell the odor at least as strong as in that bedroom, and especially since you said seems stronger since the cleaning, I would bet you have rust-through or a separated joint in the exhaust ducting/flue which the cleaning opened up even more than before. Unless the flue pipe is quite short (which can be checked with a drop light) sounds like time to run a camera through there. Some Duct Cleaning and some Heating and A/C firms have them, otherwise you may need to get a Sewer Cleaning contractor in with a sewer camera. (Run camera with those appliances off, of course - I would bet toasted camera does not smell good, not to mention expensive to replace.)


You also did not say if the HVAC contractor check the combustion in the furnace and water heater to be sure they were clean-burning, and confirmed there is no accumulation of either liquid oil or of gooey/hardened oil "coke" or slag in the combustion chamber - though if that smell is getting to that room then exhaust gases are too, eitehr from flue pipe or direct from the utility room air.

Answered 9 months ago by LCD




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