hi Shane, I too have a kohlangaz gas fire with a simular problem (goes out when it wants) our fire is one which has pebble things on. When we take off the pebbles the fire stays on as long as the fire is not turned up full. I have phoned up our gas engineer today (got answer phone) he should be able to mend ours. As soon as he has I shall write to you to tell you what he has done.. I know how frustrating it is when it keeps going out.
peter king
December 2007