Gas Fireplace Flame Adjustment [5 Easy Steps]

The flame in your gas fireplace not burning perfectly for many reasons. But, you don’t have to be worried at all. Here, in this article, we will be talking about how you can perfect your gas fireplace flame adjustment.

gas fireplace flame adjustment

And, by the end of this article, you will be able to deal with whatever problem you have with your fireplace flame. So, let’s get into it…

Perfect Your Gas Fireplace Flame Adjustment [5 Easy Steps]

A fireplace is the part of your home where you expect to relax on colder days getting cozy heat from your fireplace. Many people choose gas fireplaces nowadays because it’s convenient and comparatively easy to maintain.

But, if you can’t properly adjust the flame of your gas fireplace, then you won’t be able to enjoy the conveniences you paid for. To get proper heat from your gas fireplace, you have to adjust the flame perfectly.

adjust the flame

Are you thinking about the Lennox gas fireplace flame adjustment or worried about the Regency gas fireplace flame adjustment? Read the following steps to solve all flame issues instantly:

Step 1:

First, you have to locate the gas control knob which is responsible for how much gas your fireplace uses. You will find this knob below the ceramic logs. The knob is usually black and has a small pointer. It has the word “pilot” featured on it as well.

Step 2:

Light the gas fireplace by turning the control knob to the “pilot” setting. Firstly, rotate the knob to the left and push it in. This will allow the gas to flow into the pilot light. Ignite the pilot light by pressing the sparker or you can use a match as well.

Step 3:

Now, you have to let the flame burn for a minute. For this, you have to release the control knob and allow the flame to burn. Keep the control knob at the lowest flame setting.

Step 4:

Find the switch that is located at the front of the gas logs. It’s supposed to be marked “ON”. Move the switch to this “ON” setting to ignite the burner. Now, observe the initial flame height.

Step 5:

You have to make the adjustment in accordance with the height of the flame. Turn the knob to the right to reduce the flame height. And turn the knob to the left, if you want to increase the flame height. 

Adjust the flame height to maintain the temperature you want. And this is how with 5 simple steps, you can easily adjust the flame of your gas fireplace.

Adjust Pilot Light Flame On Gas Fireplace

You can enjoy your fireplace only till the pilot light stays on. The pilot light provides heat to power the furnaces, water heaters, and fireplaces. With the help of a thermocouple, the pilot light stays on and keeps the fireplace burning. 

This is why it’s important to keep the pilot light of your fireplace stable. Your pilot light should be blue all the time as you can see in the picture.

 pilot light should be blue always

If it’s not, then here’s how to adjust the pilot light flame on the gas fireplace.

  • Locate the controls places at the bottom of the fireplace
  • There can be a “Lo-Hi” button as well that will allow you to adjust the height of the flame
  • If there is no such button then there will be a screw
  • Adjust this screw with a screwdriver
  • Turn the screw clockwise to reduce the flame height
  • Turning the screw counter-clockwise will increase the flame height
  • The flame will be yellow or orange if the pilot light is not right
  • Keep adjusting the flame till its blue

To be honest, getting the pilot light fixed is a hard task. However, if you maintain these steps properly, then you will be able to adjust the pilot light flame of your gas fireplace with ease.

Solutions To 3 Problems With Gas Fireplace Flame

It goes without saying that flame is the essence of a fireplace. This is why you always have to make sure the flame burns perfectly in your gas fireplace. 

gas fireplace

However, despite maintaining everything your gas fireplace can have some problems with its flame.

The good news is these problems are easily solvable within minutes if you are aware of the proper method. May your inquiry is about Astria fireplace flame adjustment or any other device, you won’t have any difficulty solving the issues with flame.

Here are the 3 most common problems and their effective solutions:

1. Gas Fireplace Flame Color Adjustment

Adjusting the flame color of your gas fireplace can be tricky. But, it’s something important to deal with.

gas fireplace too blue flame

You may see your gas fireplace flame is too blue and want to know how to make the gas fireplace flame yellow. Here’s how to adjust the gas fireplace flame color:

  • Turn off the gas valve and on again
  • Change the battery of the monoxide detector
  • If the flame is blue, close the fuel/air mix shutter a little bit
  • If the flame is orange or red, open the fuel/air mix shutter a bit
  • If nothing works, change the fuel

Well, if you try these things, your gas fireplace should have a perfect yellow flame.

2. Gas Fireplace Uneven Flame

If your gas fireplace has uneven flame it can be very problematic. The fireplace won’t generate enough heat if this happens.

gas fireplace uneven flame

The reason behind such issues is dirty burners. If the burner is clogged up with dirt and debris, it can generate an uneven flame.

So in case of this type of situation, simply just clean the clogged burner. Once you have cleaned up all the debris, your fireplace should generate even flame again.

3. Gas fireplace Flame Too High/Gas fireplace Flame Too Low

Sometimes you may notice that something about the flame of your gas fireplace isn’t right. You may wonder why my gas fireplace flame is so low or so high.

low flame & high flame

If you notice such changes in your flame, you should consider fixing the flame height immediately. To adjust the flame, you have to use the control knob.

Turn the knob to the right, if you want to make the flame lower. And if you want to make the flame bigger, turn the knob in the opposite direction. 

Well, turning the knob to the right will decrease the flame, while turning the knob to the left will increase the flame. It’s simple!

These 3 are the most common problems you are likely to face with your gas fireplace flame. If you are aware of the solutions and properly maintain our gas fireplace instructions, you shouldn’t have any problem dealing with such issues.

Well, you can also watch the video below on flame height adjustment of a gas fireplace.


How do you adjust the flame color on a gas fireplace?

Adjust the vent door to control the flame color. The flame will get bluer the more you open the vent door. And if you close the vent door, the flame will get red. Adjust the vent door at a midpoint to get a perfectly colored flame.

Is it normal for Mantle to get hot?

Yes, it’s normal to get the mantel hot. But, look for the solutions when the mantel gets too hot.

How high should the flames be on a gas fireplace?

It’s important to keep the flame of your gas fireplace at its perfect size. The ideal height of the flame should be 3.5 inches. Always try to adjust your flame to this height.

How do you fix a low flame on a gas fireplace?

First, try to adjust the flame & ensure proper gas pressure & venting. If it doesn’t work, to get a bigger flame on your gas fireplace you can use silica sand over your burner in case you own a natural gas log. However, when it comes to propane gas fireplaces, you can use vermiculite on the burner to fix the problem of a low flame on a gas fireplace.

Why is my gas fireplace flame so low?

There can be 3 reasons why your gas fireplace flame is so low.

  • Low gas pressure (put more fuel in the fuel tank)
  • Widely open vent (close the vent to slow down the draft)
  • The control knob is turned rightwards (turn the control knob leftward)

What should the flame look like in a gas fireplace?

The flame of your gas fireplace should be steady and yellow. If the flame is blue, then close your air vent a bit. In case the flame is red or orange, open the air vent to make the flame yellow again. 

Should a gas fireplace always have a flame?

Though you can keep your fireplace burning throughout the year, it is recommended that you turn off the gas fireplace pilot light every 2 or 3 months. This will save you money and keep the fireplace healthy.

Is it safe to leave a gas fireplace on all night?

No, you should never leave your gas fireplace on throughout the night. This doesn’t only hold the risk of carbon monoxide poisoning, it can light your house on fire as well. In a word, it’s not safe to leave a gas fireplace on all night.

Final Words

Flames are the main part of a gas fireplace. If the flames aren’t right, then you won’t get an adequate amount of heat from your fireplace.

So, in case you notice any type of changes in the flame condition of your fireplace, keep the above discussion in mind.

Well, if you have any further inquiries, feel free to comment below.

About William

William is the founder of He has real life practical skills in fixing smoker & heating appliance issues. He loves to share his knowledge & helps others in fixing their appliances & saving their money. William firmly believes that anyone can repair his or her unit with the correct guidance & knowledge. See more at about us.

10 thoughts on “Gas Fireplace Flame Adjustment [5 Easy Steps]”

  1. Hi you say, “2. Gas Fireplace Uneven Flame
    If the burner is clogged up with dirt and debris, it can generate an uneven flame.
    So in case of this type of situation, simply just clean the clogged burner.”

    How do you clean it? I tried vacuuming it, which helped, but looking it the flame it seems I am missing a step.

    • Hi Walter

      You can also use compressed air to clean the burner properly. Plus, inspect & clean the ignitor & thermocouple for carbon build up.

      Hopefully, you will get the expected result.

      Have a great day!

  2. My 23.5 inch ventless gas stove gives out a smoky smell when it is in use. I vacuumed it out and washed the logs. I dried them outside for 4 days but the problem still persists. The flame has an orange color near the tips. Is there an air/fuel mixture adjustment?

    • Hi Andrew

      Maybe the air that helps in the combustion of your stove is impure. This impure air can produce a such smells that are amplified by the flame.

      Well, to fix the orange flame issue, open the fuel/air mix shutter a bit.

      Hopefully, your gas stove problem will be solved.

      Best of luck!

  3. Hello,
    My pilot is lit though recently my burner has been going out after 15 minutes and now it won’t light at all. My draw on the thermopile is 470. Thoughts?

    • Hi Walter

      As the pilot lit, to fix the burner going out issue, check the spark igniter. Clean all the dirt between the thermocouple & the igniter.
      Also, you can blow compressed air into the pilot area, wait for a few minutes & then try to ignite the unit.

      Hopefully, you will get the solution.

      Wish you all the best!

  4. When I switch my fireplace on it seems good but flames up where the burner mounts on the office of the incoming line? What might be the cause?

  5. I just turned on the pilot light to my natural gas fireplace and it works, replaced all batteries but there is no flame coming on when temperatures are below the remotes setpoint?? What am I missing?


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