Knowledge Builders

why does my gas fireplace hiss

by Chyna Weimann Published 2 years ago Updated 1 year ago
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Causes of Noise From a Gas Fireplace

  • Improperly set pilot light There is a pilot light in your gas fireplace, which is responsible for creating a flame. It is similar to how a gas stove works. ...
  • Problems in the connector tube A gas fireplace has a connector tube where the gas travels to reach the fireplace log. ...
  • Poor fireplace quality ...
  • Gas supply blockage ...

The hissing could be the result of gas not being burned off because the pilot light is too low. The pilot light should be approximately the height of the flame on a cigarette lighter.

Full Answer

Why does my gas fireplace make a hissing noise?

A hissing noise or obnoxious whistling sound may occur if your gas fireplace needs adjustments. Fortunately, remedying these noises doesn't require expensive tools or parts.

Why is my gas fireplace pilot light hissing?

The hissing could be the result of gas not being burned off because the pilot light is too low. The pilot light should be approximately the height of the flame on a cigarette lighter. If something seems off with the gas fireplace pilot light, shut off the gas source and twist the screw next to the pilot light to either lift or lower its height.

How do I Stop my gas fireplace from hissing?

Most gas fireplaces list a recommended pilot light height you should adhere to. Finally, turn the gas back on to ensure the pilot light is the correct height and the hissing noise has disappeared. Whistling gas fireplaces are often the result of copper or aluminum tubing that isn’t smooth on the inside.

How do you fix a gas fireplace that makes noise?

Twist the screw with a screwdriver to raise or lower the flame to the height recommended by the owner's manual. Turn on the gas source with the key and start a fire to determine if the noise stops. Turn off the gas source to the logs by using the gas key.

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Why does my gas fireplace whistle?

Obstruction. Whistling in a gas fireplace may also be the result of an obstruction in the gas supply. The obstruction does not have to be anything big, as small bits of dust and dirt or even air in the gas supply may obstruct the flow of gas. When the gas supply becomes obstructed even slightly, the pressure of the gas moving against ...

How does gas enter a fireplace?

The gas enters a gas fireplace or gas fireplace log through a flexible connector tube. This tube must be installed with the gas log or when installing the gas fireplace unit. If the tube is improperly installed, or is not installed at all, a whistling sound may be produced by the fireplace.

What is a pilot light in a gas fireplace?

Pilot Light. A gas fireplace uses a pilot light to ignite the gas and create a flame, similar to the way a gas stove operates . If the pilot light is improperly set, a whistling sound may be produced. Pilot lights for gas fireplaces should be kept on a low setting and gradually increased to light the flame. If the pilot light is kept on ...

What happens if the pilot light is on high?

If the pilot light is kept on a high setting, the result is a flame in the fireplace along with an annoying whistling sound effect. Check your fireplace's owner's manual for instructions regarding the proper setting of your fireplace's pilot light. Advertisement.

What is gas fireplace?

A gas fireplace is an option for those who wish to have the look and feel of a fireplace without the maintenance of a wood fireplace. Instead of using wood logs to create a flame, gas fireplaces use a direct input of gas ignited to create flames.

Can a flexible tube make a whistling noise?

Furthermore, if the flexible tube is made of a corrugated material, the tube may produce whistling noises even when installed properly. Prevent this problem by exactly following the instructions in the owner's manual for your fireplace and by using only stainless steel or aluminum, noncorrugated connector tubes. Advertisement.

What causes a gas fire pit to whirl?

The 2 Main Causes of a Whistling Gas Fire Pit are the flex gas lines or the gas supply pressure to the fire pit.

Why does my fire pit make a whistling noise?

Whistling noises not caused by the Flex gas lines usually indicates too much gas pressure supplied to your fire pit.

How much does it cost to replace a whistle free gas line?

Depending on the length of the lines, this costs about 20-30 dollars.

How to get the best flame out of a fire pit?

To get the best flame from your fire pit, we recommend aiming for the higher end of the pressure range. If by chance, you are a Qualified Gas Technician , then you know what to do. For those who are not, we highly recommend that you get some professional assistance at this point. The technician will measure the gas pressure at your fire pit ...

Can you fix a gas flex line?

Fortunately, the fix is relatively simple, but you may need the assistance of a Qualified Gas Technician if the issue is not the Gas Flex Lines.

Can a fire pit be noisy?

The problem of noisy, whistling fire pits is not uncommon, and fortunately, it is usually relatively easy to fix.

Do flex lines stop whistling?

If removing the kinks from the flex lines does not stop the whistling noise, you need to question if the flex lines installed are whistle free. Whistle Free Flex Lines have a multi-pattern series of ridges in the pipe, ensuring no build-up of pressure causing vibrations and whistling. If you are not sure that the existing gas lines are Whistle ...

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Why does my gas fireplace make a hissing noise?

The noise reduces the enjoyment of a cozy fire and the relaxing ambiance. A hissing noise or obnoxious whistling sound may occur if your gas fireplace needs adjustments. Fortunately, remedying these noises doesn't require expensive tools or parts. Advertisement.

Why does my fuel line whistle?

Often the whistling noise is caused by corrugated tubing that isn't smooth inside the tube. Replacing corrugated tubing with smooth aluminum or copper tubing often fixes the problem.

How to locate a pilot in a fire?

Locate the pilot by using a flashlight and peering inside the firebox with the fire turned off.

gas logs make hissing noise

I have an old woodburning fireplace that has no flue and is not lined, so I was advised by the chimneysweep to put in the gas logs. I recently installed Peterson vent-free logs. After burning off the smell of the new logs, I still have some odd odor in the room. I think that is because I haven't sealed up the chimney yet.

Comments (2)

I'm not sure I am understanding this. Are you saying you are burning ceramic logs in a gas fireplace without an opened damper? OR are you saying it is wide open all the way up? What do you mean seal up the chimney?

What does it mean when a fire makes a hissing noise?

As hissing noises are a sign of a poorly burning fire you should therefore look to ensure that you’re always burning properly seasoned or kiln dried firewood with less than 20% moisture content.

Why does my firewood make a hissing sound?

Hiss sounds from burning firewood is a sign that the wood is too high in moisture or sap content. Unseasoned firewood that is still too wet to burn efficiently can make hissing noises as the excess moisture within the wood is burnt off.

What happens if you burn firewood that is too wet?

If your firewood is still too wet it will have a reading of over 20%. Firewood over 20% moisture will therefore burn ineffectively in a fire and can produce hissing sounds as the excess moisture is burnt off.

Why does wood make a hiss noise?

Firewood can produce a hiss noise as the e xcess moisture within the wood heats up and tries to escape. The higher the moisture content of the wood the more the firewood can hiss when used in a fire.

Why would unseasoned firewood struggle to burn on a fire?

As a result of high moisture content in unseasoned firewood it would struggle to burn on a fire.

Why is wood hard to burn?

When wood can’t be combusted effectively the fire can struggle to burn the wood, leading to a fire that is hard to get going and hard to keep going. More smoke can also be produced as a result of incomplete combustion of the wood.

Should Seasoned Firewood Hiss?

If firewood has been properly seasoned to below 20% moisture content it shouldn’t hiss when used on a fire.

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