Stupidly we ran out of oil having not realised that the depth gauge was no longer working. Having a full tank of oil now, we are unable to get the boiler going properly. We have pressed the reset button, but unfortunately the boiler only fires for about 10 seconds before switching itself off again. I am assuming we have air in the system. Our boiler is a very old and enormous Jetstreme MkII. Is it possible to bleed this myself? Would anyone reading this know where I can get more information on bleeding this particular boiler? Or quite by chance, is anyone familiar with this boiler and knows how to do it!?