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Adjusting goodman propane burners

I have a 90% propane furnace with 3 burner units. Each has a adjustable screw which allows me to cut down on oxygen. currently wide open Flame going in chamber more yellow than blue. Should I adjust....?

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  • Anonymous Mar 28, 2014

    Lenox LF24-75A flame is not go going down in the burner tube as far as the other 4 tubes and turns to a lazy yellow flame when the other burners shut off

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Yellow flame can also mean inadequate gas pressure. Do you have a manometer? If not, call your gas company for a check.

Posted on Oct 21, 2008

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My Home propane tank was empty, I just had it filled, but when I go to turn on the heat, a flame icon comes up. I noticed on the heater it has an on/off switch for the automatic pilot light. I am not sure...


Make sure all switches are on and open. It may take a few attempts to get gas to the burners so you may have to reset the furnace by either the Emergency switch or circuit breaker. If it takes longer than 3 tries, you may have a gas regulator problem and will need to call your gas company for repair. The regulator belongs to the gas company so they shouldn't charge you to repair or replace.

On a call for heat, the 24 volt thermostat sends a signal to the control module. The control module will indicate a call for heat with a light on the control either blinking or remain solid depending upon model. The inducer (exhaust) blower will purge all gasses from the furnace and pressurize a pressure switch. Once the pressure switch tells the module to continue, the electronic ignition will energize and send 120 volts to the igniter. The igniter will glow and you will be able to see it if viewed thru the small inspection port. Once the igniter gets hot enough, it sends a signal to the module opening up the gas valve (24 volts). Either a pilot will come on or the burner tube will ignite then spread the flame to all burners. Lastly a safety sensor will be looking for a certain temperature within a few seconds and the furnace will continue to operate and the room air blower will turn on in a minute or two.

What could go wrong? The unit will not run if there is no signal from the thermostat (bad thermostat or broken wire), the control module does not sense a signal from the thermostat (bad control), the inducer does not energize (bad motor), the pressure switch does not close (blocked vent piping, bad switch, plugged condensate hose), the igniter does not energize (bad control, bad igniter), the gas valve does not open or there is no gas (bad gas valve, broken wire, no gas), the pilot does not light (dirty pilot), the burner does not light (bad burner, plugged orifice, not enough combustion air), the flame does not spread to each burner (bad flame spreader, dirty flame spreader, more bad burners), the flame safety sensor does not detect flame (dirty or bad flame spreader, bad flame sensor, broken wire, bad control), or the room air blower does not energize (bad fan motor, bad control).

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1 Answer

I turned my propane fireplace on and it set my smoke alarm off. We have lived here for three years and never had this problem before. Please advise.


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I have a coleman furnace with a pilot light that keeps going out.When i manually light it the furnace runs 12 to 14 hours, then no more pilot light and i must relight.


Remove the burner and gas valve from the furnace and use compressed air to blow the area under the pilot area ans all around it. The dust and stuff usually cause a condition called "Lazy Pilot" and the flame is probably not going in the designed directions. While you have it out Id replace the thermocouple with a new one reassemble and re-lite and note the difference. The flame should be mostly Blue and no yellow (or vary little at the top end of the flame only) Orange in the top area indicates a good burning flame and the closer to the base the bluer it gets.


While you have the burner out look inside and inspect the inner heat exchanger for cracks or rusted open holes there should be none. Turn on your fan while inspecting and see if you feel the steady blow of air from it inside the heat exchanger indicating a hole. Don't confuse the air that may come down the flue with the air from the blower though. A little breeze is expected from this.

This will take care of over 90% of the problems with the "Blow out" symptom.

If you still have problems you can try and "turn up the pilot". Usually a screw close to the pilot tubing is covering the adjustment screw. Put some soap bubbles around it so you can see if it leaks or not and turn the screw out for more flame (CCW) and in (CW) for less.

Hope this helps Please grade me accordingly and good luck.

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Have a colemen presidential II- when it is windy at all the pilot light blows out- have checked the vents and have no wind threw them. you can see the wind just howling threw the heater area where the...


Remove the burner and gas valve from the furnace and use compressed air to blow the area under the pilot area ans all around it. The dust and stuff usually cause a condition called "Lazy Pilot" and the flame is probably not going in the designed directions. While you have it out Id replace the thermocouple with a new one reassemble and re-lite and note the difference. The flame should be mostly Blue and no yellow (or vary little at the top end of the flame only) Orange in the top area indicates a good burning flame and the closer to the base the bluer it gets.


While you have the burner out look inside and inspect the inner heat exchanger for cracks or rusted open holes there should be none. Turn on your fan while inspecting and see if you feel the steady blow of air from it inside the heat exchanger indicating a hole. Don't confuse the air that may come down the flue with the air from the blower though. A little breeze is expected from this.

This will take care of over 90% of the problems with the "Blow out" symptom.

If you still have problems you can try and "turn up the pilot". Usually a screw close to the pilot tubing is covering the adjustment screw. Put some soap bubbles around it so you can see if it leaks or not and turn the screw out for more flame (CCW) and in (CW) for less.

Hope this helps Please grade me accordingly and good luck.

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Inefficient (big, yellow flame) on wall propane heater, using up propane too fast


A clue to what could be wrong is that you mentioned it took 10 minutes for the pilot to go out. It could be your gas valve. Get a technician in to check your gas pressure both before the gas valve and after. Have them check it as the water heater is running.

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Flame Adjustment


Make sure the unit is operating on the correct gas, Natural or Propane (LP). The sound you are experiencing is either not enough gas and the flame is burning inside the burner port(s) or too much gas and the flame is much larger than it has to be. At any rate, get a technician to check the gas pressure entering into the home. NOW!

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