Hiya, I have got Ferrolie Optima condensing boiler installed less than 2 years ago, now it is making banging noise in the flue when hot water tap is run, noise is getting worse sometimes very loud like miss firing car.
Please guide me with any helpful advise what to do.
Thanks and look forward to hearing from you.
Kind regards,
Paul

Paul, August 2009

Explosive ignition, The electrodes would need to be checked and possibly the gas/air mix. This is something for a qualified engineer and is not something that should be done by yourself.
You were asking for trouble buying a Ferroli to be honest.

Mr Boiler, August 2009