Why My Dyna Glo Heater Won’t Stay Lit [Reasons + Solutions]

If your Dyna Glo heater is not working, then don’t worry because in this article we will be discussing the common reasons why your Dyna Glo heater won’t stay lit and what you can do about them.

These reasons are bad thermopile, dirty pilot burner orifice, excessive airflow in the system, lack of oxygen supply, and dirty pilot feed.

By the end of this article, you will learn to fix your Dyna Glo heater very easily. So keep on reading.

Why My Dyna Glo Heater Won’t Stay Lit [Reasons + Solutions]

Fixing a Dyna Glo propane heater that won’t stay lit can be challenging. But if you know the right method, it will be easy as cake. Here’s everything you need to know.

1. Bad Thermocouple

The thermocouple is an important part of the Dyna Glo heater. It signals the system to allow or block the gas flow to the burner.

However, if the thermocouple gets damaged in any way, it sends the wrong signal and eventually shuts off the burner without any cause. This can be a good reason why a heater doesn’t stay lit.


If you have this issue, you have to replace the thermocouple. Here’s how to do it:

  • Open up the front panel of the device
  • Expose the main control board
  • Locate the thermocouple near the control board
  • Disconnect it from its wire connections
  • Pull out the faulty thermocouple
  • Install a new thermocouple in its place
  • Put everything back on

Now that your heater has a new thermocouple installed, the device should run just fine.

2. Dirty Pilot Burner Orifice

The pilot light is an indication that there is a consistent gas supply. And as we discussed earlier, the thermocouple gets a signal from this pilot light and determines the gas supply in the system.

So if the pilot light shuts off for any reason, the thermocouple will send a signal to turn off the whole system. The pilot light usually shuts off due to a dirty burner orifice.


The main issue here is the clogged pilot burner orifice. You may have to either clean it or replace it as a whole. Here’s how to clean it:

  • Disconnect the device from its power
  • Unscrew and open up the device to expose the interior
  • Locate the pilot light burner
  • Remove this pilot light burner
  • Find the pilot burner orifice right beneath the burner
  • Pull out the burner and clean the obstructions with a thin bristled brush
  • If the orifice is beyond cleaning, take a new one and set it in place of the old one

Once everything is set, put the device back together. Now the pilot light should work just fine and your Dyna Glo should consistently stay on as well. 

3. Too Much Airflow

Your heater needs airflow to stay active. However, excessive airflow in the system can cause your Dyna Glo to shut off. Excessive airflow mainly blows out the ignition and thus causes the ignition failure of the heater.


The most probable reason behind too much airflow in the Dyna Glo heater is any kind of leakage in the device. So observe the whole heater thoroughly bit by bit. Once you locate the point of leakage, fix it in the following way:

  • Clean the spot first by wiping it
  • Apply a mixture of cement on the leaking point(s)
  • Let the cement dry on its own
  • Colour the cement matching the heater once the cement paste is dry
  • Turn on the device. If the problem remains, look for further leakage points

Once you have sealed all the holes, the heater should get back to work.

4. Oxygen Scarcity

Just like excessive airflow can be the reason why your Dyna Glo heater won’t stay lit, lack of air can cause the same problem as well. 

The scarcity of oxygen doesn’t allow the heat to stay active for longer. This is why the most common sign that oxygen scarcity is the issue is when you plug in your Dyna Glo heater, it will slowly turn off. 


The lack of airflow mainly results from the dirty air vents. Blocked air vents obstruct the essential air supply. So you have to clean the vent to solve the problem. Here’s how to do it:

  • Start off by unplugging the device
  • Wipe the vent path clean
  • Use a brush to thoroughly clean the vent
  • Use a can of compressed air to clear off further dust from the vent path
  • Finally, open up the side of the air vent and clean the dust accumulated there
  • Put everything back on

Once you’ve successfully cleaned the air vent, your Dyna Glo will turn back to normal.

5. Obstructed Pilot Feed

Previously we have discussed how a blocked pilot burner orifice can be the reason why your Dyna Glow won’t stay on. Another similar reason for this issue is obstructed pilot feed. 

The pilot feed is the path that allows gas flow to the pilot light to keep it burning. If something such as a spider web or debris is stuck in the pilot feed, the fuel will not pass through to keep the pilot lit. As a result, the thermocouple will signal the system to turn off the device. 


As you have probably already guessed, you have to clean the pilot feed. Here’s how to do it,

  • Turn off the heater
  • Unscrew the heater panel and expose the inside of the heater
  • Locate the pilot light
  • Remove the pilot light burner to locate the pilot feed tube right under it
  • Use a strong wire to clean whatever is stuck in the tube
  • If the tube is already cracked or damaged in any way, get a new one and install it instead
  • Put everything back on before turning on the device.

Your Dyna Glo should burn just fine with the new pilot feed tube.

Now that you know the solution to the Dyna Glo propane heater won’t stay lit, you will no longer have such an issue.


How do you know if you have a bad thermocouple?

The best way to know about a bad thermocouple is to notice if the flame light goes out when the gas control knob is released after holding it for 30 seconds.

How much does it cost to fix a heater?

If you consult a professional, fixing a heater can cost around $300.

How often should a heater be cleaned?

You should clean your Dyna Glo heater at least once a year.

How much BTU does the Dyna Glo heater produce?

A Dyna Glo heater produces around 65,000 BTUs of heat.

Final Verdict:

Dyna Glo is a great heater. But it can have certain problems, such as not staying lit. But if you follow the method we discussed in this article, you shouldn’t run into this problem anymore.

However, if you do face any difficulty, let us know in the comment below.

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.

9 thoughts on “Why My Dyna Glo Heater Won’t Stay Lit [Reasons + Solutions]”

  1. I just bought one and under the number two setting it shuts off. The pilot stays on but the heater won’t burn on the number one setting

    • Hi Thomas

      Clean the pilot assembly with an air compressor. Plus, check the thermocouple and replace it if you get it defective.

      Hope you will get the solution.

      Wish you all the best.

    • From: Clay Manning

      Thief River Falls MN

      Hi William,

      The DYNA Flog goes out and doesnt stay lit. It is a Professional Grade Model SF70DGD 70,000 BTU.

      Bought it used from guy who said it wont stay lit. Can you help me by telling me where I can order the correct Thermo Couple for this model. Called parts company and the call taker was not sure.

      Thanks for your article and any help.


  2. Brand new dyna- glo propane ventless ran fine for about 3 hours then the pilot went out so I relit it set temp ran fine got to temp shut off pilot went out when it shut off not sure what the problem is on this new unit.

    • Hi Buzz

      Generally, the Dyna Glo heater’s pilot light goes out due to a weak flame, faulty thermocouple, lack of oxygen supply, dirty pilot burner orifice, or defective gas regulator.

      But as your heater is a new one, it would be wise to contact the Dyna Glo customer support center or your local Dyna Glo dealer before doing anything by yourself.

      Best of luck!

      • Dyna Glo 50000 btu diesel serial number serial # 3119AFF00013 keeps shutting down I have a second heater the same and no problems.

        • Hi Peter

          Your Dyna Glo heater keeps shutting off due to one or more reasons like the heater’s pilot light going out due to a weak flame, faulty thermocouple, defective thermopile, lack of oxygen supply, dirty pilot burner orifice, or defective gas regulator.

          Well, to fix the issue, first try to find out the main culprit behind the problem. Then, fix it following the solution guide in the article.

          Hopefully, your heater’s shutting down problem will be solved.

          Wish you all the best!

  3. We just bought a new Dyna-Glo GBF30DTDG-4 and connected to a propane gas cylinder. When igniting the Pilot Flame is much too high, and goes out when releasing the pilot push button, what can be the cause that the heater does not work ?


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