On Sat, 30 Apr 2005 22:45:23 +0000, John Stumbles wrote:

Lobster wrote:

cheesey_toastie wrote:
Fixed a leaky ball cock value and then drained the central heating to
clean it out as there seems to be a blockage in the downstairs radiator
(in the kitchen).

There was sludge in the header tank which has filled back up again, no
longer overflowing as it did with the broked valve. However the
radiators are not filling with water and when i turned on the hot water
the pump was dry running.

How can i get the water circulating again! I think the header tanks
sludge has caused a new blockage... though i added the chemiclas to
clean the sludge... will it unblock overnight!

Airlock? Google the archives of this group for solutions - comes up
regularly

Seconded, but it could also be a blockage due to gunge which has got into
the system in which case you can blast it out by judicious application of
mains pressure into the system at appropriate point and possibly closing
off other parts of the system.

I'd put a bet in there being a partial blockage where the feed pipe joins
the circuit, enhanced by the arrival of more sludge.


--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at http://www.diyfaq.org.uk
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