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Hi all , could you take a look at this Picture , it's of my cooker when we were on holiday last week , you can just make out the orange flame tips , does anyone know what causes the tips to go orange . The gas bottle was about half full , and it was early morning , inside the caravan was a little cold , could the cold be the reason for the orange tips ?
Note the flame tips were not yellow .

Thanks Wizard

found this for you,gives an indication of moisture or to much air in the system......not good anyway.

http://www.google.co.uk/search?sourceid=navclient&ie=UTF-8&rlz=1T4RNWE_enGB306GB306&q=gas+orange+flame+help

If the orange flame is coming from all the outlets in the ring, then there is something inside the ring causing this.

If the orange flame is happening when any of the rings are in use, then it is something in the gas.

It the orange flames are only coming from certain outlets in one ring, then dirt/food particles/whatever have somehow got into the outlets. Possible when someone wiped the stove down with a less than clean cloth.

I would certainly check these out before I went to the expense of calling out an engineer.

Thinking back to the old bunsen burners at school. We adjusted the air until the flame was blue. When it was the ratio of gas to oxygen was just right.

With a cooker, the oxygen at the top of the flame could well be less than at the bottom,.as the air is rising up from the bottom of the flame to the top. I would expect it to be a little orange.

When you put a pan on top, the gas will spread out and form a lower flame height. This will mean there is less oxygen depletion at the top of the flame, in which case it will be blue.

This may be a load of rubbish a I'm an electrical engineer, not a gas engineer.