A yellow or orange flame on a propane torch indicates incomplete combustion, meaning the fuel is not receiving enough oxygen to burn efficiently. A proper propane flame should be mostly blue, indicating a high-temperature, efficient burn (approx. 3,596°F).
A yellow or orange propane flame means the gas isn't getting enough oxygen, resulting in incomplete combustion, less heat, and soot. To fix it, you need to adjust the air intake, clean out blockages, or reset the propane tank.
Fix a clogged propane torch by cleaning the burner tube with compressed air or a thin wire to remove debris (often spider webs), or by replacing the fuel canister if the regulator pin is stuck. Common fixes include disassembling the tip, checking the orifice, or soaking components in cleaner to remove varnish build-up.
A proper flame should be a soft blue (Natural Gas) or blue with slightly yellow tips (LP Gas). If the flames are not the right color, too high or too low, the flame may need to be adjusted.
A weak, small, or flickering propane torch flame is usually caused by a tripped safety valve, a clogged nozzle, or an empty cylinder.
How Do You Fix Low Flame?
Burping a propane tank is an easy troubleshooting step used to reset a tripped safety valve or release trapped pressure that prevents gas from flowing correctly.
When propane gas burns with the correct ratio of fuel to air, there is enough oxygen for complete combustion of propane. The gas molecules in the flame are ionized and the propane flame is blue—as it should be. The blue flame means that your propane is burning at its full heat, so you aren't wasting any fuel.
Aboveground propane tanks are typically filled to about 80 percent capacity, which leaves 20 percent of the tank empty for expansion (we call this the “80/20 rule”); underground propane tanks be filled slightly higher, because the ground insulates the tank from big temperature swings.
Pure carbon monoxide burns with a vivid, translucent light blue flame. However, if you see a yellow, orange, or red flame on a standard gas appliance (like a stove or furnace), it does not mean you are seeing the carbon monoxide itself. Instead, these colors indicate incomplete combustion, meaning the appliance is likely producing and releasing dangerous carbon monoxide alongside soot.
To burp (or bleed/purge) a torch lighter, turn it upside down, set the flame to low, and use a small tool like a screwdriver to press the filling valve at the bottom until all hissing stops and air/excess fuel is released. This removes trapped air, ensuring a full refill and a consistent flame.
To unstick a propane regulator (often caused by the safety bypass valve tripping), turn off all burner knobs, close the tank valve, disconnect the regulator from the tank for 1–2 minutes to "reset" the pressure, then reconnect and slowly open the tank valve. This process resets the internal mechanism that limits flow.
A propane torch's lifespan depends on the fuel tank size and flame intensity. A standard 14.1 oz handheld canister lasts about 1.5 to 2 hours of continuous use, while a large 20 lb grill tank can last anywhere from 10 to 30 hours.
Red flames or propane-natural gas flame colour orange, instead of a blue flame, may mean signs of incomplete combustion, wasted gas and a serious safety hazard.
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 igniter are clean and free from any debris.
We cannot properly see the tanks when it is dark. We risk losing our license and put our staff in danger if we do not properly inspect tanks before refilling. -We cannot see if a tank is leaking or propane is pooling if the light is insufficient.
Propane tanks of 100-pound capacity or less have a requalification date of 12 years from the date of manufacture. Once those 12 years are up, you can either exchange the tank for a replacement or have it inspected for requalification for an additional five years of use.
When you use your propane gas cooktop, you should always see a blue flame. That's good, because it's normal. When the ratio of fuel to air is correct, there is enough oxygen for complete combustion of propane. Complete combustion results in a blue flame.
Common Causes of Propane Problems
Leakage: Propane leaks can occur due to damaged lines, loose connections, or faulty appliances. Regulator Malfunctions: Issues with the propane regulator can affect the consistent flow of gas to appliances.
A blue flame is caused by complete combustion and very high temperatures. When a fuel (like natural gas, propane, or butane) burns efficiently, it gets enough oxygen to completely convert the fuel into carbon dioxide and water vapor.
Rubbing a raw potato on a hot grill deposits a layer of starch onto the metal, creating a natural, non-stick barrier. This prevents delicate foods like fish, chicken, or vegetables from sticking to the grates and helps clean away leftover food residue.
A soft humming sound with no gas smell from your propane tank is considered normal and not a cause for concern.
The pressure in a 100# tank should be no different that in a 20# tank.