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
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