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Worcester 28si 11?

I've changed psb and fan,when I switch boiler on red light flashes straight away with CH off and not calling for hot water.??????
Neil, March 2014
Start with restart move ,see water pressure why change fan and PCB was it red light before you change,refer to manual

ltd, March 2014
link Click here to see other fixes for Worcester Bosch 28si 11.