In message , BigWallop
writes



If you can't hear the flue fan running in the boiler, then I'd be tempted to
say it is that which is at fault, again. You say the new fan was a
re-conditioned one, but you didn't say what made the old fan go faulty. You
may have fitted the new fan unit to a faulty boiler. What was the symptoms
of the old fan unit failing? Did you get any sort of guarantee with the
re-conditioned fan? Did you test the circuit that supplies the fan from the
boiler?

And ... was it one of mine ?

If so, as I said in an earlier post, I've (CET) had a ~ 0.1% failure
rate on these fan motors, so it's unlikely

Is there 230 volts across the fan ?

I can always be reached on 01923 229224 if you need walking through
problem solving
--
geoff