sorry, I got mixed up on the side of the boiler. Left hand side of the boiler as looking from the front, just above the mini expansion vessel. There is also a filter in the pipework make sure this is clean also.
corgigasman, September 2010
sounds like flow valve fault, not sensing water flowing through boiler. Flow valve located on pipe on the r/h side of the boiler. Usually starts by rattling first before failing alltogether.
