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homeguides.sfgate.com/causes-burner-flame-gas-stove-yellow...

Gas burners burn blue if the ratio of fuel to air is correct. A yellow burner flame is a symptom that the burner is not getting enough air for complete combustion of the gas.

www.elgas.com.au/blog/1585-why-does-a-gas-flame-burn-blue...

A yellow gas flame is indicative of incomplete combustion and carbon monoxide emissions. Yellow gas flames only burn at around 1,000°C. Gas Fireplace Flame Color Gas fireplace flame color (colour) is typically designed to burn with an orange flame color or yellow flame color for a more natural look.

homeguides.sfgate.com/correct-color-flame-gas-heaters...

Natural gas consists primarily of methane, a substance that gives off a blue color when burned. A properly burning gas heater should produce a sharply defined, blue-colored flame with just a ...

inspectapedia.com/plumbing/Gas_Flame_Noise_Defects.php

Gas burner troubleshooting: Gas Appliance or Gas Heater Flame & Noise Defect, How to Diagnose & Report Gas Appliance or Heater Flame & Noise Defects How to report defects found in oil or gas piping inspections, Home inspection report language examples, Questions & answers about gas burner operating problems: flame defects, noises, safety hazards, How to Diagnose & Report Gas Ap...

www.appliance411.com/faq/gas_range_flames.shtml

Gas Range Flame Characteristics. When burning natural gas, the burner flames should be almost completely blue with possibly a small hint of yellow in the center of the flame as seen in figure "A" above. When burning liquid propane (LP), the flames will usually have a yellow tip as seen in figure "B".

www.hunker.com/12003355/why-is-my-gas-stove-burning-orange

Gas burner orifices may become clogged from a buildup of soot, which results in an uneven supply of fuel to the burner. When the flame burns the soot, the resulting incandescence is orange. The wrong orifice may be installed for the type of gas you are using; liquid propane and natural gas do not have the same air-to-fuel requirements.

ontime59.com/furnace-flame-tips-correct-incorrect-colors

What is the Danger of Incorrect Flame Colors? A blue flame from your furnace or gas stove indicates complete combustion of the gas. If you have a yellow, orange, or red burner flame, this usually means that your burner is not receiving enough air for complete combustion.

bfplumbingbayarea.com/blog/gas-hot-water-heater-flame-yellow

Have someone check the flame. Know what the color of your flame is telling you! Blue – Gas burners burn blue if the ratio of fuel to air is correct. Orange – Orange flame is usually dust or dirt getting burned, keeping watching it for a while it should turn blue. Yellow – No air is going to flame, and this needs an inspection immediately.

www.thespruceeats.com/why-flame-gas-grill-is-yellow-335060

A yellow flame can be caused by a bad mixture of gas and air. This can be typically fixed by adjusting the burner air intake. To adjust the burners on your gas grill, you are probably going to have to get under or inside the grill. The adjustment point is where the burner connects to the grill manifold (usually right behind the control valves).

pcappliancerepair.wordpress.com/2015/09/13/orange-and...

Make sure the burners are clean and placed correctly. If you have an orange or yellow burner flame on your gas range make sure the burner portholes are clean and free of debris. Spillovers and cooking grease can block these openings which can affect the flame color. Make sure the burner holes and ignitor are clean and free from any debris.