Why Gas Fireplace Goes Out After A Few Minutes [Fix Now]

Your gas fireplace goes out after a few minutes due to a dirty or faulty pilot, damaged thermopile and thermocouple, built-in safety switch, insufficient gas, and airflow.  

To fix the shutting off issue, very first check the pilot light and find if it’s working fine or not. Then make sure there is sufficient gas and airflow. Plus, investigate the thermocouple and thermopile and ensure they are working fine. 

After going through all these fixing methods, if you still find your gas fireplace is shutting off, don’t get frustrated. Go on reading the article, you will find a few more effective solutions. 

5 Reasons Why Gas Fireplace Goes Out After A Few Minutes

Now, let’s know in detail about the major reasons for going out gas fireplace after a few minutes:

1. Insufficient Gas Flow

If you are burning a large flame for a long time, then you may notice that the gas fire goes out after 15 minutes. The longer you keep the gas burning, the quicker the gas will run out. As a result, the fire burns out quickly. Basically, the insufficiency of gas flow causes the gas fire to go out after a few minutes.


The only solution is to ensure the perfect gas flow to the pilot. Adjust the gas flow with the control knob. Here you can read our guide on how to adjust the gas flow and fireplace flame of your gas fireplace.

2. Faulty Parts

When the parts of the gas fireplace aren’t in the right condition or they aren’t properly placed, then you will notice that your gas fireplace shuts off intermittently.

Mainly a faulty gas valve will result in the type of situation we are talking about. Clogged and dirty burner ports can also prevent fire from lighting up. The burner port is a vital part of the gas fireplace. If it has any fault such as clogging, your fireplace won’t function properly.


  • Make sure the fireplace is placed perfectly.
  • Replace the gas valve if it’s faulty.
  • Clean the burner pot

3. Insufficient Air Pressure

It’s a known fact that Oxygen is essential for flames to burn. The absence of it will surely cause the gas fire to go out. If the air intake to the unit is somehow blocked, then the gas is not getting enough air pressure to use. When there is insufficient air pressure and all the oxygen is burned up, the gas fire automatically goes out. 


Check and find if anything is blocking the air into the unit. Here, it’s wise to clean the whole unit to ensure sufficient airflow and oxygen to the fireplace.

4. Built-In Safety Device Oxypilot

You may have a built-in safety device Oxypilot to monitor the insufficiency of the oxygen in your room, shutting off the gas fire and thus saving you from carbon monoxide poisoning. 

So, when your Oxypilot finds the carbon monoxide high inside your room, the device simply shuts off the gas flame. And the total procedure happens by heat reducing from the thermocouple and putting out the gas valve. 

Plus, when your sensing device gets blocked with dirt and grim, flame can’t reach the electrode or thermocouple. And so you will find your gas fireplace is shutting off.    


  • Ensure enough air flow and oxygen inside your room.
  • Check and find if the dust and soots built up inside the oxypilot. If yes, clean the device. 

5. Dirty or Faulty Thermocouple And Thermopile 

If the thermocouple and thermopile get dirty or faulty, they can’t open the gas valve and thus the pilot light can’t ignite your gas fireplace. Though sometimes, it can ignite, a few moments later, the gas fireplace shuts off automatically.  


  • Check the thermocouple and thermopile with a multimeter and find out if they are working or not. If you find any one is faulty, replace that one.
  • If you discover the thermopile and thermocouple ends get rusty with carbon buildups, simply clean the carbon buildups.

Other Factors Behind The Gas Fireplace Going Out Frequently

Besides the above factors, your gas fireplace may go out due to tripping the circuit breaker. Plus, if your gas fireplace is with a remote receiver, there is a possibility of the battery going dead on the remote or receiver.

So, check and replace the remote or receiver battery. Also, make sure the gas line is on or the propane tank is filled with gas. Further, when it’s windy, you may find your gas fireplace keeps going out. 

Gas Fireplace Doesn’t Work Properly [5 Issues To Fix]

You might get irritated because your gas fireplace is struggling with so many issues. Don’t worry. Let’s know from which factors your fireplace is suffering and fix it instantly:

1. Gas Fireplace Stays Lit But Pilot Won’t Stay On

The pilot light is the indicator that helps you to understand the condition of your fireplace. It’s basically a small steady flame fueled by a small stream of gas.

It shows that the fireplace still has gas running. This is why a functioning pilot light is very important. If the pilot light isn’t on even when the fire of the fireplace is still running, you will have to take some simple measures.

First, shut off the gas feed and wait for a few minutes. This will make sure that there is no excess gas built up in the system. After a few minutes, the pilot is supposed to light up. If the flame isn’t on yet, repeat this process. 

2. What To Do If Gas Fireplace Goes Out and Comes Back On

Sometimes you will notice that the gas fireplace won’t stay lit but the pilot light stays on. The fire will blow out only to come back on again. What can you do if this happens?

You can deal with two things in case this happens. Firstly, test the gas valve at the PV and PV/MV connections. If it seems okay, then the problem is probably with the main burner. When the burner of a fireplace gets too dirty and has debris clogged in, it won’t stay ignited.

The debris will only allow an inconsistent flow of gas. This can make your fire blow out and light back again.

So, when this happens, closely examine the burner and if you find that it really has dirt, clean it properly. You can use a can of compressed air to blow out the clogged debris from the area.

3. What To Do If Gas Fireplace Won’t Light

If your fireplace won’t light at all, you have to detect the problem first. The fuel is a great factor here. If the fuel is not properly burning, then your fireplace won’t burn. In this case, refill the fuel tank and check if the gas tank is perfectly fine. Try to look for cracks.

Another major issue that can cause your fireplace not to light is a faulty ignition fuse. In most gas fireplaces, there is electronic ignition. Its purpose is to ignite the flame that will be the fire of your fireplace. Several issues can damage the electronic ignitor. You may even need to change the fuse.

4. What To Do If Gas Fireplace Smells Like Gas

If you are smelling gas from your fireplace, then you should immediately turn the fireplace off. Smelling gas means there is a leakage. Even a small crack can result in irrevocable disaster. 

After shutting off the fireplace, open up the windows of your room to allow the gas to escape. Taking further measures by yourself can be risky. Rather, it’s better to call a professional in this situation. 

5. What To Do If Gas Fireplace Won’t Turn Off

Your gas fireplace may not turn off because of some defects. Even if you turn off the wall switch and close the gas valve, the gas fireplace can still stay on. In this situation, there are 2 things you can do:

i) Rewiring:

Cut off the fireplace from the three-way switch. This way your fireplace won’t have any supply of power to stay on and should turn off immediately.

ii) Installing A Thermostat

You can use a thermostat as a switch. Install a millivolt thermostat if the fireplace doesn’t go off. The thermostat works for two reasons. 

Firstly, it doesn’t function with traditional 120V which can be problematic sometimes. And secondly, the thermostat shuts your fireplace off automatically after it has reached a certain level of temperature. 

It can be annoying if your fireplace goes out after 15 minutes of burning. But you won’t have to spend dollars to solve this issue. If you can follow the solutions we discussed above you will be able to deal with your gas fireplace effectively. Just maintain patience and you are good to go.

3 Ways To Check Whether Your Gas Fireplace is Safe or Not

It can happen sometimes that you think there is something wrong with your gas fireplace but you are not sure. Debris, water, excessive heat, and many other issues can cause problems with your fireplace.

Keeping your faulty fireplace the way it is can result in disaster in the future. So, when you feel that there is an issue with your fireplace, it’s always wise to be sure. It’s even better to check your fireplace every time while lighting it. This way your fireplace will last for a long time.

Here are 3 ways to check if your gas fireplace is safe to use:

1. Check If Everything is in Proper Condition

Clogging is a big issue when it comes to a gas fireplace. Debris usually clogs the path for gas and fire. This results in clogging. It prevents fire from burning properly. Check the connection between the fuel tank and the burner. If there is any form of leakage or defect it can be problematic.

2. Look At The Flame

A good gas fireplace will have a perfect flame. Take a closer look at the flame quality. It must be clean, bluish and will ignite instantly. The flame will be upward and will be free from odor or smoke.

If it doesn’t light up the moment you start the gas or the flame is unstable in any way then there are definitely some problems. Check the burner and the gas vault for obstructions or debris. 

3. Examine The Chimney

The chimney is one of the main components of a gas fireplace. To make sure your chimney is ready to be used, you have to observe it from outside. Use a ladder to get closer to the chimney or use a binocular to determine if the chimney cap is properly attached to the top of the chimney. 

The purpose of these caps is to prevent animals, trees, and rain or snow from entering the chimney. It is an essential safety measure. If your chimney is blocked then you should fix it before lighting up your fireplace. You can call a professional for this task.

After you have properly checked these points, you can rest assured that you won’t have any problem operating your gas fireplace.


Can I replace my gas fireplace?

Yes, you can replace your gas fireplace. To do that you need to change the inserts. But replace the insert only when you have these issues,

  • The fireplace is out of date
  • Your fireplace needs constant repair
  • If the parts need to be updated
  • Or you want to add new features such as gas hearth

What is the lifespan of a gas fireplace?

There is no definite life expectancy of gas fireplaces. But, if you use your gas fireplace properly, it can last for 15 to 25 years.

How often should you replace a gas fireplace?

As the lifespan of a regular gas fireplace is around 15 to 25 years, this is the duration you should wait to replace your gas fireplace and install a new one.

How much does it cost to install a gas fireplace?

Ans: The cost can vary depending on what type of inserts you are looking for. The inserts cost around $1,200. And to get it all installed can cost you around $500 to $3,000.

Is a gas fireplace worth it?

A gas fireplace is really convenient and it looks very classy as well. There is no hassle of wood-burning or of cleaning the ashes. In addition, it costs very little compared to other options. So yes, a gas fireplace is definitely worth it.

How do you update an old gas fireplace?

To update an old gas fireplace, you can follow these suggestions.

  • Paint the brass surround
  • Retile the fireplace
  • Paint the fireplace and the mantle surround

And then go for a few maintenances for getting better heat from your gas fireplace.

Is it cheaper to run a furnace or gas fireplace?

Operating a furnace for an hour costs about $1.10 to $1.50. And a gas fireplace costs $0.45 per hour. So it is apparent that a gas fireplace is much cheaper than a furnace.

Can you get carbon monoxide poisoning from a gas fireplace?

Unfortunately, yes. Gas fireplaces are one of the main potential causes of carbon monoxide poisoning.  However, proper maintenance can reduce such effects.

Final Words:

Now you know the reasons why a gas fireplace goes out after a few minutes. Plus, you know the immediate solutions after reading the article. So, we can assure you now you don’t need to spend single money while facing the above troubles. You can solve it yourself.

Just follow everything we have discussed above and get the solution. It surely isn’t hard to do. Now, let us know if we can help you in any way. We will be glad to help you out. 

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10 thoughts on “Why Gas Fireplace Goes Out After A Few Minutes [Fix Now]”

  1. I have had my gas fireplace looked at by a qualified repair person. He said the wiring may cause the fireplace to go out. He replaced the wall switch and tightened the wires. The fireplace continued to go out after a few minutes.

  2. I have a gas fireplace that burns for 20 minutes and then pilot goes out. After that we turn it back on and it goes out in 5 minutes, this continues until we don’t use it for a few days, then it goes back to being on for 20 minutes and then goes out, including pilot light.

  3. I cleaned my thermopile and thermocouple, then the switch turned on the fireplace (pilot light was lit). Now sometimes turning on the electric switch results in having to turn it on 2-3 times before flames appear. This morning the flames started but went out. Two days ago, I heard occasional puffs, like it was restarting. Is there anything I can do?

    • Hi Karne

      Then you may need to replace the thermopile and thermocouple. Find out which one gets faulty and change. Here you can get help from a professional.


  4. Thank you for the article. Both my fire and my pilot stay on when the glass is off but go out within seconds when I put the glass front back on and seal it. I think I have an air pressure issue but don’t know where to look to solve it. Chimney cap looks fine. Can you help?


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