A healthy gas burner should show a crisp, even blue flame with maybe a light blue tip. If yours has turned yellow or orange, that is the burner telling you the air-to-gas mixture is off — and it is worth fixing, not just living with.
Why the flame turns yellow
A blue flame means the gas is burning completely, mixed with the right amount of air. A yellow flame means it is burning incompletely — usually because a jet or burner port is partially blocked, dust or spilled food has settled inside the burner cap, or the air shutter has shifted out of position.
- Blackened or sooty vessel bottoms — a clear sign of yellow-flame burning
- Slower cooking times than usual for the same flame setting
- A faint sooty smell while cooking
- Visible orange tinges especially at the flame tips
Yellow flames are not just a cosmetic issue — incomplete combustion produces more carbon monoxide, and in a closed kitchen with the chimney off, that matters. It is a five-minute fix that is worth doing immediately, not "whenever we get to it."
Lead Technician, Chimney & Hob Service
What the fix actually involves
In most cases we remove the burner cap, clear the jet and ports of any blockage, clean out grease build-up around the base, and realign the air shutter so the flame burns evenly across every port. It is routine work, done in a single visit, and the difference is visible the moment the burner is relit.
