Recent content by harleyboiler

Thanks for the suggestions. The RGI i had out seems to think its the heat exchanger. If it was that the case would it only kettle when the hot water is running? Obviosly mine is doing it when the heating is on as well.

please help- my boiler is 5 years old and has started kettling both when the heating is running and also when running hot water. Plumber called and suggested de-scaling and traetment added to system but no improvement. In heating mode boiler only runs for a couple of seconds then trips- both...