Gas Fireplace Won’t Stay Lit. How to fix it?

Reading Time: 5 minutes


A gas fireplace is a great appliance to have around on cold days, without the hassle of traditional fireplaces. However, sometimes a few minor issues can cause trouble.

If you’re wondering why your gas fireplace won’t stay lit, how to fix it is not so difficult. The main issue is usually that the gas fireplace pilot light won’t stay lit.

You can fix all these issues in a few simple ways.


brown frame fireplace
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Why Your Gas Fireplace Pilot Light Won’t Stay Lit

Any gas run appliance is likely to face issues with the pilot light. This includes furnaces, water heaters, and even your gas fireplace.

If you’ve noticed the gas fireplace only stays running for a few minutes, then there is likely a pilot head problem. A complete replacement of the pilot head is one way to resolve the issue.

While the thermocouple can also cause problems, it’s best to replace the whole pilot head set up. This is also recommended since it costs the same price. In case the dysfunction persists, you may have valve-related issues.

Apart from replacement, you can also try adjusting the screw on the valve. This valve is meant to control the pilot flame. By adjusting it, you can make the pilot flame bigger. While unscrewing to allow a bigger flame, keep in mind that the screw does not completely fall off.

Additionally, keep in mind that the settings of each pilot light will be different. Check the instructions before you try fixing any parts of your gas fireplace.


Why Your Gas Fireplace Won’t Stay Lit, How to fix it?

Is your gas fireplace not turning on? In most cases, the main issue with gas fireplaces is the pilot light. You can simply try turning it on and expect better results.

Incase reigniting the pilot light is not working out; other parts may be causing the issue. The following parts can be faulty in your gas fireplace.


Take A Look At The Thermocouple

The thermocouple is meant to ensure the safety of your gas appliance. It is a small metal device located near the pilot flame. It allows the gas to make its way from the valve to the pilot light.

The main setup of the thermocouple also includes the wiring that connects to the gas valve. The purpose of this is to conduct the electricity that ignites the pilot flame.

To check your thermocouple, switch the gas valve towards the pilot. Press the override button for a minimum of 30 seconds. This will allow the thermocouple to gather heat. If everything is working, the pilot should light soon. However, if the pilot fails to light even after a few tries, the thermocouple needs fixing.

The way to fix the thermocouple is by removing it with the help of a wrench. Purchase a new thermocouple and buy some properly sized nuts for the new one at the hardware store. The new kit you buy should include nut adapters as well.


Check The Drip Loop

The drip loop of an appliance is a pipe with a cap connected to the gas meter of your fireplace. The purpose of a drip loop is to keep moisture from seeping into the gas line. It does so by catching any water or moisture right at the start.

If the gas fireplace is not lighting up, there may be excess condensation in the gas line. This can make the pilot light dysfunction. To eliminate a drip loop issue, check for an overflow.

To resolve an overflow into the gas line, use a basic pipe wrench. Drain the excess moisture by opening the cap on the pipe.


The fire in the hearth was so warm and welcoming and such an iconic subject it just had to be shared.
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Ensure There Is Enough Flame Heat

If the pilot light turns on momentarily, take this chance to look at the pilot opening. The color of the flame should be bright blue. If this isn’t the case, then the set up isn’t hot enough for the thermocouple to do its job.

Even if your thermocouple is functioning, the pilot flame has to be directly in touch with the device. The metal piece should be crossing the flame that is formed.

After the flame goes out, check if the thermocouple is held tightly in place. In case it is loose, you will have to re-install it and tighten it using a screwdriver.


Clean The Burner

The burner is a small device with multiple tiny holes. Its purpose is to provide gas that flows to the pilot light. You will find the burner right at the bottom of the thermocouple and pilot light.

Clogging is common because the burner holes may fill with carbon. You can clean them out by using an air compressor. Another simple way is to use water and soap.

The gas flow is likely to be faulty when the flame isn’t blue in color.


Examine The Wall Switch

Since the thermocouple is linked to the wall switch, a faulty wall switch can cause issues. A properly functioning switch will send a current that ignites the flame. If there isn’t enough voltage, ignition will be compromised.

Check for faulty wires in such cases to fix the flow of the current.


Assure The Gas Valve Is Working

Problems with the gas valve are usually rare. However, after every other part is checked and assured, a gas valve issue can be the culprit.

The gas valve cannot be checked at home, nor can it be removed by hand. It is best to consult a professional when you think the gas valve is acting up. Re-installing a gas valve will require considerable effort and expertise.

Winter is coming…
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Safety Precautions To Keep In Mind

Since the gas fireplace is a major appliance, fixing it by yourself can be risky at times. Ensure you always read instructions and consult a professional if the task seems too difficult to manage.

Always ensure certain safety precautions when working alone on your gas fireplace. Keep in mind that gas is a flammable substance, and you should remove any fire hazards away from it. Although the main procedure of checking your fireplace set up isn’t difficult, an accident can be catastrophic.

In Summation

There are many quick ways to ensure the working of your fireplace. If you’re wondering why your gas fireplace pilot light won’t stay lit, you can try out some simple solutions. If the gas fireplace won’t stay lit, how to fix it requires troubleshooting the entire system.

Now that you know the steps to follow, troubleshooting should be much more convenient.

Thank you for reading!

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