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Hello again all! My boiler is on the blink again - it's a (now somewhat old) Worcester 28CDi RSF, and has previously had the DV diaphragm, fan and PCB replaced (by a competent tradesman where appropriate), as well as the manual timer replaced with a computerised one following various...

Hi all - first post here though I have visited numerous times in the past prior to registering today. I have a problem with my 10-year-old Worcester 28CDi boiler - not the first problem but the first on which I need to ask particular questions. I am well aware that any gas work is a big...