cheers dave,
pretty sure its the pump as when system reaches temp and boiler shuts off the only thing i believe is still running is the pump, it also is not noisy on hot water eg when filling bath
I have a 30 ci Glowworm combi boiler. I had it fitted 3 years ago and I have always thought it was noisy. When the heating is on which is a lot at the moment you can hear what I believe is the pump from everywhere in the house.
I have been told by two engineers who work for homeserve that they...