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glow worm 30cxi bolier?

I have a boiler as above and it has become faulty.
The code underneath the red light is 03
What does this mean?
thank you

Mary
February 2016
Heating, Home Heating SystemsGlow Worm 30cxi
if there is no "f" with the number then it is just showing the system pressure which is 0.3 bar you need to top it up to 1.0

ps
February 2016
means no flame, look it up on youtube,

h
February 2016

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