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Question DetailsAsked on 1/16/2017

I have a strong gas smell when my older ventless fireplace is on. This is something new. What does this indicate?

The fireplace is about 20 years old. The gas smell has never been this strong. We clean the fireplace and components every year. There is no odor when the fireplace is off. What could be the issue? Do these systems stop working?

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2 Answers


Here are a few similar previous questions with answers FYI too -

Might be smart to schedule a cleaning at the same time, for less incremental cost than if you schedule it separately another time, if about time again.

And yes, this is common - the valve mechanisms, seals and gaskets, thread dope or tape, etc all deteriorate with time - more so if the firebox is damp as is common with gas fireplaces after they shut off (because a major component of the exhaust gas is water vapor), so rusting can also cause gasline and burner leakage. A particularly common leakage point is the gas control valve which, with frequent use, can develop a leak around the moving stem or cylinder of the valve, resulting in a slight leak from the valve - sometimes continuous, sometimes only when non, depending on where the leak is.

You say it has "never been this strong" implying it is fairly strong - I would shut off the power to it and the gas shutoff valve outside the appliance and not use it till fixed by a Heating and A/C contractor or a Plumber (or Gas Fitter if in one of the few states where all gas wrok has to be done by them) - because once you have seen a gas stove/fireplace blow up from being ignited with it full of gas, you will never mess around with even a tiny gas leak smell again - if you survive the hail of metal fragments and glass shards.

Answered 3 years ago by LCD



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Answered 3 years ago by Member Services

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