Recent content by ncornell

more info.....if i turn the temp down on the boiler to about half from max the noise goes away..

for a while about six months. the noise has been getting slowly louder over that time

I have a potterton suprima 30-80 style boiler. My problem is this: Once the CH has clicked off a howling starts and the sound can be heard though the pipework between the boiler and the boilermate. It last for about 45 secs and is sounds like a valve in the boiler is closing or switching flow...