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Hi, can anyone help me I have an alpha cb24 boiler which wont produce hot water, took the diverter valve off and found diaphpram erroded replaced full diverter valve assembly with genuine part and rebulit still have no dhw and diverter valve making cavitaion noise have tried to bleed system with...

Hi, can anyone help me I have an alpha cb24x boiler which will not produce hot water have followed flow diagram in the manual and narrowed the fault down to the flow switch or diaphragm and diverter valve.The flow swich seems to operate ok when tested on the multimeter but unsure how to check...