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combi boiler noise

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sach52 | 07:16 Fri 02nd Mar 2007 | DIY
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when hot water is turned on i get a loud knock from boiler
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Avatar Image xx marti xx
you have air in the system,bleed each radiator in turn.Dont forget to top up the system as you go coz bleeding off the air will lower the pressure in the system.
You may hve to do this several times.
02:10 Thu 22nd Mar 2007

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combi boiler noise

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