Banging noise from pipes/boiler

14 Nov 2006
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United Kingdom
I have a Ferolli F24 boiler.

After about 30 secs of starting up the central heating a loud banging noise occurs (sounds like its coming from pipes into boiler).
The banging noise lasts about 10 secs and then the boiler makes a buzzing noise. The central heating still works okay.
The banging noise occurs everytime the heating is turned on however the buzzing noise sometimes doesn't occur.

I recently let air out the rads and re-pressurised the system.
I also recently had to turn the stop cock off to fix a tap. I think the banging noise may have started after turning off the stop cock.

Any suggestions on what the problem might be?
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Hmmm... was your Boiler/heating on when you turned off the Stop Cock by any chance?
I'm quite sure the heating wasn't on.

I also noticed when turning the heating on today that there was a slight whistling noise just before the banging.
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recently fitted a towel radiator in my bathroom but when the heating goes off or comes on we get a tapping noise intermittent for the firs ten minute

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