Banging/clanging noise

7 Apr 2009
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United Kingdom
Hi people.

I have a gloworm combi boiler. Its making very loud clanging/ banging noises(well at night it sounds very loud). I have flushed the system and put a cleaner into it.

Its been in for about a week. I will empty it today and put a noise inhibitor in.

Im sure the noise coming is from the boiler. The boiler makes a rushing noise when it is clanging and stops when the clanging stops. I have turned up the pressure in the boiler to see if that would change anything but it hasnt.It sounds like a valve is continually opening and closing.

Do any of you have any ideas. Thanks.
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the cleaner has only been in for a week. I have now flushed the system and put a noise inhibiter and anti corrosion liquid in.

I have not heard any knocking yet, but i have not had the heating on either as its been too warm.

Thanks for your replies so far.

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