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boiler not heating water fully?

my worcester 24cdi does not heat water fully, but if run i cold water slightly at same it heats up more?
stevo, March 2010
flow rate may be too high. slow it down at the tap and see if it heats better. 24kW boiler will provide around 9 litres of hot water per minute. if still not heating then get an engineer in to check burner pressures, thermistor readings, pump / circulation before someone tells you your plate heat exchanger is scaled up, but that is a possibility also.

Ian, March 2010
link Click here to see other fixes for Worcester 24CDI.