"BigWallop" wrote in message
. ..
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?

It was the original fan, so over a decade old, and was just groaning and
turning very slowly - basically 'old age'. Boiler had been serviced a week
before that by British Gas.

Did you get any sort of guarantee with the
re-conditioned fan?

I'd have to check but I'm sure I do. It was from CET Ltd. who seem quite
good.

Did you test the circuit that supplies the fan from the
boiler?

Nope, that's the next step I guess. Can you confirm if I simply use a neon
screwdriver on the red/brown cable that goes into the fan to check this?
Then if it is live but the fan is dead, then the fan is... well, dead I
assume. I'm quite clever, me.