Why My Patio Heater Flame Too Low + How To Fix [Solved]

Patio heater users face several problems with their system, and the low flaming issue is very common among them.

A blocked burner orifice, kinked gas hose, and insufficient fuel in the propane tank are mostly reasonable for causing the Patio heater flame too low issue. 

Don’t take it too hard if you encounter the same problem. Our comprehensive guide is going to break down this problem with only 3-quick methods. So, without getting late, let’s get started… 

Patio Heater Flame Too Low [3 Easy Solutions]

In this part, we have explored the reasons behind your patio heater flame getting too low and their solutions.

1. Clean Burner Orifices

Blocked burner orifice, venturi tubes, and burner ports are the main culprit for causing low flame on your patio heater. Also, if there is any blockage in the emitter screen, your heater will encounter the flame tissue. 

So, it needs to clean out the complete surface of the heater to keep it properly working. Before that, you have to know the proper process of cleaning. Here, we have included the procedure that will help you a lot:

  • First, you have to disconnect the gas line by unscrewing the coupler. On the base of the heater, you will find a coupler attached to the gas inlet valve.
  • Now take a screwdriver and start unscrewing the nut to remove the top cover of the patio heater. 
  • After that, you will see the burner assembly, which you have to clean. 
  • Take a cotton swab and dip it into rubbing alcohol. Now start rubbing the burner with this.
  • Then the time is to clean the venture tubes. You will find it on the back of the burner assembly. To remove clogged from them, use a pipe cleaner. Insert the pipe into the tube ad pull it out thoroughly to remove blocked debris from it. 
  • Now remove the emitter and start cleaning it with soapy solution water. Use a non-abrasive scouring pad to clean the inside and outside of the emitter screen.
  • After cleaning, place the cover in the back position. Then, reconnect the coupler to the inlet valve.
  • Turn on your heater, and the flame problem should be solved. 

2. Check and Replace The Kinked Hose

A kinked gas hose is also one of the main reasons in the case of a Patio heater no gas flow or low gas flow. The kinked hose contains leaks and cracks, which causes gas leaking.

So, if you are troubled with the flame issue on your patio heater, it will be best to check the gas hose if there is any leakage there. To check out this:

  • Turn on the gas.
  • Take soapy solution water and brush it on both sides of the hose.
  • If you see bubbles at any point, it is sure that there are leaks.
  • The only solution is to replace the hose with the new one. The below section will describe the replacement procedures.

How To Replace The Gas Hose

  • Turn off the gas of the heater and let it be cool.
  • First, you have to remove the old cracked hose. For this, unscrew and loosen the hose clamps.  
  • Now detach the hose from the regulator and gas appliance by twisting it very carefully.
  • Then, take your new hose and start twisting it on the attachment point. You may smear the attachment point with a bar of soap for quickly pushing on.
  • Finally, tighten the hose clamps with the regulator attachment point. Make sure it is attached firmly.
  • That is how you will change your defective gas hose.
  • Now, turn on the gas and check the flame.

3. Check The Fuel Level in Propane Tank

If all the above process fails, it is time to check the fuel level on the propane tank. The heater will easily catch the low flame problem when the tank is less than one-quarter full. To check the fuel level:

  • Turn off the gas supply of the heater.
  • Then, disconnect the propane tank from the gas hose.
  • Now, turn the valve clockwise to open it.
  • Check inside how much fuel is there.
  • If there is not enough fuel, refill it with the supply tank.
  • Otherwise, replace the tank with a fully new one.
  • Now screw the valve and connect the hose by screwing it tightly.

For your information, sometimes it needs to purge the air from a brand-new propane tank. Here we have included the right purging process for your convenience:

  • First, turn on the control knob of the propane tank high.
  • Leave it for 2-3 minutes.
  • Make sure there is no air mixing with air before igniting the heater.


Why there is a yellow flame on my patio heater?

The main reason for causing yellow flame on the heater is incomplete combustion. Also, blocked burner ports lead to this issue which is a sign of cleaning or replacing them.

Why does my patio heater keep shutting off?

The common issue for the heater shutting off includes malfunctioning the thermocouple. When it is too far from the pilot tube, it fails to detect the light and turns the heater off constantly. 

Final Verdict

Throughout this article, we have included all the reasons for occurring low flame on a heater with their solving methods. We expect that now you can easily fix your heater flame issue. 

Still, if you have any queries, don’t hesitate to hit a comment. Our expert team is always ready to help you. 

About William

William is the founder of Fireplacehubs.com. 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.

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