Recently I refurbished a room and had a 20 year old Grant back boiler replaced with a new one, to avoid further disruption in the future. Original Back Boiler was working perfectly. I now find that when my Oil Burner is running, the Back Boiler is heating up and gurgling etc. Can anyone offer a solution. please. I fear that I might have to have new fireplace etc removed to access pipes? A small "door" located on the side of the chimney breast allows access to the circulating pump and some pipework. Here's hoping!
Thanks in advance.
Thanks in advance.