On 04/11/2016 23:36, Tim+ wrote:
Tim+ wrote:


On further reflection, it may be the the gas valve as well as leaking
slightly isn't passing enough gas when it's supposed to be open to get the
gas mixture right for ignition. All in all I would have thought a
replacement valve was the obvious next step.

(I should add I'm not a gas fitter, just interested in how things work, or
ought to work).

Tim



That was my thought ... not enough gas so it fails initial 'strike'
then there is too much gas in there for when it does light - hence the
bang .... but no proof of that.