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Screaming central heating pump

M

martinmich

Joined
18 Dec 2010
Messages
4
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0
Location
Essex
Country
United Kingdom
Screaming central heating pump?
every now and then my central heating pump makes a loud screaming noise (running dry ) i have an open vented system yplan i have checked the header tank and it is full if i drain water from the system it refills as expected i cant work out why the pump keeps running dry i have to bleed it becoming more frequent i have also removed and flushed the pipe from the header tank to the pump so im sure there is no problems there please help
 

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