Once again thanks for the replies (and a quick message to any of the contributors of the previous posts who seem to doubt my Gas fitting competence purely based on the way that I described the tests that I carried out, I would probably prefer if you just refrained from bothering to answer at all).It aint constructive and sometimes it is just plain rude. Honestly I despair sometimes at our trade no wonder people think plumbers/heating engineers are so up themselves, trust me boys it is a big wide world out there and the be all and end all of it is not whether a test is called by the correct nameI know it doesn't help when trying to help with a problem, but I didn't deserve the answers I got.(And that is also an apology for the people that were trying to help I guess that's what comes of working for yourself after a 13 hour day,

And for the safety conscious of us all, it's OK i made the appliance safe before leaving the property.
Any other constructive replies are ALWAYS appreciated and I would like to apologise to the genuine posters here for my small rant, but I am sure you all know where I am coming from.And for the others... Please get a life.