Hmm... for the second time since installation in 2004 I suspect the board has gone (the first was faulty from new and replaced by WB under warranty)
I`m getting different error codes upon resetting / powering down for a while, and the manual suggests it could be the board knackered (four flashes per sec & one flash per sec have been seen).
Is there a known problem with the boards in these (as there is with certain other brands) ?
This is the same boiler that locked out in December and couldn`t be reset, but "miraculously" worked again when we came back from holiday two weeks later to a stone-cold house.
Its been on 24/7 for about 2 months, and last night I switched it to timed - similar circumstances to how it "failed" in December - it was working fine until I switched it to the timer, then locked out the first time it was fired up again - which is exactly what happened in December.
TIA