In message
, Chas
writes
On 13 Nov, 00:39, "BigWallop" wrote:
"ab" mum@mum wrote in message

et...

and how we can resolve it.
snipped

Please give more info' on this please. Thanks.

Thanks for responding

We don't have a header tank

That's not a bad thing. Please read on.



The water is replenished in the combo

How is the water replenished in the heating system? You should have a
filling loop from the mains water supply to the heating circuit. Does your
boiler have a gauge on the front with numbers? The number showing on the
gauge should be somewhere near the 1 or 1.5 mark, at least, on the black
pointer.



All the air has been bled out of radiators

After you bled the air out, how did you put more water into the heating
circuit? You have to put more water in when you have taken it out of the
radiators.



We get hot water, no problem.

So the boiler is working fine. Good. The radiators are seperate from the
hot water system. They are on a closed loop of pipework that needs to
filled seperately from a source that allows the system to be pressurised for
the pump to circulate hot water around the radiators. After many years, the
heating circuit can become void of water because it has simply escaped. You
have to keep the water in this heating circuit, topped up to keep it
working.



A friend has called us tonight and suggested a power flush and
it will cost £300 to £400

You may have to get this done if you have allowed the heating circuit to
boil off all the water it had in it. The sludge build up will have caused
blocks along the thin pipework in places.
what a fuken thick ****** a boiler cant BOIL offthe water in a close
system. iit can only leak out go and lern about boilers


Chas - I think that this URL is what you need

http://www.oup.com/elt/global/produc...sh/elementary/


--
geoff