I have a worcester/bosch 240 combi boiler, hot tap water is intermittently hot ! but the radiators are there normal hot tempeature, had heat exchanger taken out and flushed, still no better, BG are hell bent on trying to flog me a new boiler even though its only 10 years old, Have had the system powerflushed by BG and a magnaclean fitted but still no improvement, has anyone got any suggestions on what the problem might be and a remedy
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