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water does not get hot but the boiler fires up?

my britony combi fires up for the heating and is ok it also fires up for hot water when you run the tap but the water stats cold
gary stanford, June 2007
run the hot tap and if the central heating flow pipe from the boiler gets hot then the diverter valve has probably gone

Paul the gas man, June 2007
link Click here to see other fixes for Britony.