Hot water no problem, though when it is finished the flue / fan indicator flashes. I replaced the CH temp sensor last week, the heating worked for a couple of days and now nothing. Book seems to indicate fan or PCB both cost the earth how do I determine what part is needed. Or do you have any suggestions as to how to fix

Jim, September 2008

if it works fine for hot water then cant be fan, boiler wouldnt fire if fan faulty.

if it was pump light flashing id of said divertor assembly but fan/flue wouldnt make sense

if i was there i would rule other things out before pcb.

do you have mech timer? have you linked it out to see if it'll fire? does the ch (pump) microswitch work? do you get ch demand light on?

loads of questions

iain, September 2008