I have a Greenstar 30CDi (LPG) that is having a porblem lighting. It
's was working fine but suddenly stopped working one fine day with no
warning. It tries to light (fan runs, gas valve opens, Ignition clicks
away with sparks etc ) but no flame. It's pretty new and going through
all the fault finding has not produced any clues. I keep thinking I
have missed something stupid (gas in the tank, valves on etc etc) but
can't find anything. I wondered if there might be any suggestions?

Many Thanks.