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Refilling central heating system

Joined
8 Aug 2006
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Country
United Kingdom
Hi,

I got a combi boiler and i tried to refill the central heating system but the pressure gone up to 3 so i opened the drain cock to lose some water the pressure dropped for a moment but its back up again and now the overflow is dripping.

Any suggestion how can i drop the pressure back and also stop the overflow from dripping.
 
filling loop is closed. I cant hear it filling either, which i can do when i turn it up.
 

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