boilers heating did not work so i changed the swith connected to the 3 way valve the heating then began to work in heat mode when i pressed switch manually so i then checked hot water it too was working on water mode i checked heating again but forgot to change to heat mode but heat was still...
hi i have a ravenheat csi 85 AT boiler i get hot water but no central heating on the diverter valvethere is a switch i replaced it still did not work untill i pressed the button on it then heating came on untill i took my finger off button then it stopped again so i tested hot water it works on...