What does the colour of your boiler flame mean?
The colour of the flame is indicative of the state of your boiler, so let’s have a look at what the different colours mean and the action that should be taken.

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A blue flame
A healthy boiler will have a blue flame, which means that it is getting enough air supply for it to burn or combust at the right temperature. Think back to your school science lessons and the triangle of heat, fuel and air that a fire needs to burn. The blue flame is letting you know that your boiler is receiving the right amounts of these three elements.
Think of your boiler flame as you would a Bunsen burner flame from your science class experiments. Cut off the air or the fuel and the flame will go out; have the right amount and you will see a strong, blue flame.
Red and yellow flames
If … Read more