Faint Gas Smell From Furnace

Many different things can cause a raw gas smell when the furnace is running. Faint smell of gas near furnace i ve recently noticed the smell of gas near the furnace and it seems to be coming from the union on the gas pipe. Regular gas emissions it s normal for gas furnaces to emit small amounts of gas when cycling on.

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Stay out of the house so you don t breathe in the gas fumes.

Faint gas smell from furnace.

Ensure that the gas smell is coming from your air vents. If you occasionally detect a faint gas odor near the furnace during this cycle you don t have anything to worry about. This will most likely diagnose a leaking furnace heat exchanger. Natural gas is odorless but suppliers treat the gas with a strong rotten egg smell to make gas leaks more detectable.

Turn off the gas main to shut off the gas supply to your furnace. Open windows to ventilate the gas. Older furnaces could have small cracks in the heat exchanger. If the smell is faint but does not dissipate turn off the furnace and ventilate your home.

Blockages in a heat exchanger tube could also cause that. They must educate the appliance owner about the source of gas odor and assure them that it is both safe and normal for that appliance. If your furnace smells like gas and you have ruled out the other more obvious options ensure that the smell is coming from your air vents called registers. Turn the furnace off via the thermostat.

The first time your furnace is used in the winter when furnaces sit idle for months dust and. When the furnace cycles to off there is a very faint smell of gas coming through one of the furnace knock out openings. It s very faint so not a safety concern but i want to seal it. The smell of sulfur or rotten eggs almost always indicates an issue with gas supply.

You say you smell it near the vent. If it stays there constantly the whole time it runs that might indicate a problem. However if you frequently smell gas throughout your home your furnace could have a dangerous leak. There may be some gas odor initially on a furnace as it lights but it should go away and not be there constantly.

We ve soap tested the line coming into the furnace and the valve with no signs of seepage. Here are a few times when you might detect that smell and it isn t serious. If you re smelling a strong gas odor from your furnace or air vents follow these steps. The gas from your furnace exhaust pipe is blowing back in the windows this means the gas is being safely expelled from.

If gas is present in low concentrations as the result of furnace design and the trace leakage phenomenon replacing a gas valve will not solve the problem.