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Smell gas through vents when furnace is running

I noticed this year when I turned on our heater that there was a natural gas smell coming through the vents. Alarmed I asked my husband to check it out. He seems to think that it is just not "burning off" that it is just the smell, not really the gas itself. i would really like to know!!

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  • mpanni Dec 05, 2007

    we have one in our bedroom, right near the furnace. i think i will call them tommorow.

  • Anonymous Mar 13, 2014

    I noticed an odd burning smell coming from my furnace. have several inches of a black substance under my furnace. It is gritty to the touch.l i cleared it all out, but it still smells. I know it's more than 20 years old and I've never had it cleaned. could this be the problem? The furnace works great otherwise

  • steven
    steven Nov 21, 2014

    it could have a small pin hole in the pipe

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  • 49 Answers

I would strongly suggest a carbon monoxide detector first. Also your gas provider should do a free leak check. This is nothing to play with.

Posted on Dec 04, 2007

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Williams wall heater 2509622. How do I keep the pilot on? It tends to turn off after it reaches the desired temperature.


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2509622; 2539622; 2559622; 3509622; 3539622; 3559622; ... WHAT TO DO IF YOU SMELL GAS: ... Williams furnace co. direct-vent wall furnace owner's manual (24 pages) ... Caring for Your Furnace ............24-25 Locating Wall Furnace and Thermostat ........6-7 Learn how to keep your new Williams Furnace operating.

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Dec 08, 2015 | Williams Heating & Cooling

1 Answer

I have a John Wood one pipe power vented hot water heater. The model number is Jw840nvh-fv-04. Recently I've been smelling products of combustion coming out the top of the tank where the vent is


1) Copy following link for troubleshoot resources by type of gas control valve, Venting resources, and pro water heater forum:
http://waterheatertimer.org/How-to-troubleshoot-gas-water-heater.html
http://www.thetankatwaterheaterrescue.com/forums/forum3/

2) This odor can indicate incomplete combustion due to lack of air supply. Get more fresh air to unit. Check that flame is clear blue color. John Wood is American/AO Smith product so air intake screen is located on bottom of unit. Use mirror and flashlight to inspect. Clean with compressed air ad or feather duster.

3) Jw840nvh is 40 gallon natural gas. Natural gas is lighter than air and rises upward, unlike propane gas that is heavier than air. Install gas detector at height correct for type of gas.

4) For safety, install CO carbon monoxide detector

5) Review product manual for correct vent lengths and diameters.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/gene_9f0ef4df2f9897e7

Feb 02, 2013 | Water Heaters

1 Answer

So when a vented gas water heater smells lke kerosine, is there any way to fix it? Or is it time to buy a new one. This ine is only 2 years old.


I am a little concerned here to hear this one, you should never smell anything from a hot water tank! Have you ever had the flue,or chimney checked out? Just a guess but being that this heater is two years old I would say it is a venting problem. Carbon monoxide poisoning comes to mind here, so please make sure you have a clean flue, good and adequate size exhaust pipe off the top and solid connection to the chimney/ exhaust vent.Might I also suggest a carbon monoxide detector in the area of this heater please! You do know that it is an odorless,yet silent killer and there is no price to great to save a life.

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1 Answer

My nordyne gas furnace has a terrible odor coming from it. It is not natural gas. It is really bad when the heat is coming through the heat vents and into my home, and it smells putrid and disgusting.


Perhaps a small animal, bird, etc, maybe has fallen into the burners or close by, this often happens you need to have a look for any ...Umm .. foreign matter, in or around your unit, and remove it. There is a product called "Nil-Odor" this removes and neutralise's bad smells.

Mar 02, 2010 | Heating & Cooling

1 Answer

We just had new Rheem Natural Gas Furnace


Hello. yes there is a 2 second delay and when the conditions are just right you can smell gas. Although this is not dangerous or a health risk, you could run the exhaust pipe up in the air a few feet to get rid of the smell. Regards, Joe

Feb 25, 2010 | Heating & Cooling

12 Answers

Ventless gas heater smells like kerosene


It is posible that your heater is burning fumes from paint, varnish or stain and some times carpet cleaners or other household cleaners. I work for a utility company. We get called to homes for a lighter fluid/kerosene smell quit often. Most of the time it is from the fumes burning off on a standing pilot gas oven. The odor collects in the oven and is released in the customers face when they open the oven door. This will happen with any open flame appliance when exposed to these fumes.

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Goodman gms9090 furnace


Based on your description I would guess that there is a "leak" somewhere between the gas valve and the actual fire. Use soap bubbles to check the connections at the gas valve. Also check the gaskets in the Gas valve the same way. Lastly there may be a cracked or misaligned burner causing the "leak". Best of Luck!

Jan 29, 2009 | Goodman GDS80703ANA Open Flame Mid-Size...

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