My Alpha CB24 will only produce hot water (DHW) when the central heating is running (CH). I have followed the fault finding flow chart and so far have replaced, DHW flow switch, DHW flow valve diaphragm (it was worn and had a small hole in it) and the DHW heat exchanger with no improvement. Any ideas?
Also if I unseat/lift the DHW flow switch by just a couple of millimeters the boiler fires up for DHW.
Also if I unseat/lift the DHW flow switch by just a couple of millimeters the boiler fires up for DHW.