How do I adjust the gas air ratio to give a good flame?

I have a Glow-Worm FuelSaver MK2 boiler and the flame is more yellow than blue. How do I adjust the flame colour
Norman Morton, January 2006


done
this needs specialist heating engineer tools to set this to the correct setting do not alter this without as you can cause incomplete combustion if set wrong

mike, February 2006
link Click here to see other fixes for Glow-Worm.