So the full history of the boiler is that since we got it installed a few months ago, it has periodically taken to bouts of “roaring”, not simple warm up hum but roaring.
Our installation engineer ran litres of decontaminant through the system in case there was sludge in the old radiators. This was unsuccessful.
The boiler engineer disengaged our back boiler on the fire. This was unsuccessful but is ok because apparently it was poorly engineered.
Fortunately the boiler engineer experienced the roaring this morning and said that it was definitely a boiler fault and a dangerous one at that.
So the system is offline until the boiler is replaced.
Hopefully it will be an end to this frustrating and expensive saga.
