Yellow Flame on Gas Hob
Gas hob burners producing a yellow or orange flame instead of a clean blue one, sometimes with soot.
What Is Causing This?
- 1Burner ports blocked with food debris or grease
- 2Incorrect air-to-gas ratio
- 3Faulty gas regulator supplying incorrect pressure
How Urgent Is This?
This should be fixed in the coming weeks. Leaving it may allow the problem to worsen and cost more to repair.
What Needs to Be Done
A Gas Safe engineer will clean the burner heads and ports, check and adjust the air shutters, and test gas pressure to ensure correct combustion.
How Much Will It Cost?
National average estimate
Labour: £85 – £200 | Materials: £30 – £178
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Prices are estimates based on typical UK rates. Actual costs depend on the specific issue, accessibility, and your location. All quotes from tradespeople on Tradesfolk are completely free.
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Ask a QuestionHow to Prevent This
Clean hob burners regularly with a pin or fine wire to clear blocked ports. Wipe up spills immediately. Have the hob checked if the flame colour changes.
Related Problems
Other Gas Engineer Problems
Loud banging, kettling, or rumbling sounds coming from the boiler, particularly when the heating or hot water comes on.
The boiler pilot light repeatedly extinguishes, meaning the boiler will not fire up for heating or hot water.
A smell of gas (rotten eggs) inside the house, which could indicate a gas leak.
The boiler pressure gauge keeps falling below 1 bar, causing the boiler to lock out or lose heating efficiency.