6 of 14 Rads not heating up

[Barneyjoe]

Hi,<br><br>Any advice on the following problem would be gratefully received.<br><br>I have an old house from 1959 and have started to get problems with my radiators. &nbsp;There was one rad that was temperamental but the 'disease' seems to have spread and I now have six of my 14 rads that are cold.<br><br>There are&nbsp;10 downstairs of which 5 have no heat at top or bottom and one that is still cold but a degree or two warmer than the others. There are four upstairs all working fine.&nbsp;<br><br>I have done the only bit of plumbing I know and bleed all the rads but one of them produced any air. &nbsp;I thought it might be sludge, but most articles seems to imply that the top will still get hot.<br><br>I have uploaded an image with the working rads in red and cold ones in blue. &nbsp;Any ideas?<br><br>Thanks and regards<br>BarneyJoe<br><img src="http://www.ukplumbersforums.co.uk/attachment.php?attachmentid=23892&amp;stc=1" attachmentid="23892" alt="" id="vbattach_23892" class="previewthumb">

 

[Best]

Could be sludge in the radiators. Only way to check that out well is to get a radiator removed and flushed and refitted. Any thermostatic radiator valves can have the pin below the head jammed - a few taps on the pin can free them for a while.
Circulating pumps can fail partially and tend to not heat the hardest to circulate around radiators - furthest away or any downstairs drops

 

[Barneyjoe]

Thanks for the response and I'll get someone in to have a look as it sounds outside of my skillset!

 

[sheedy]

As above, also you never mentioned what system you have system or combi, probably system at a guess, make sure all valves are open properly then try balancing rads.

 

[gassafe]

Turn off the ones that are working. It might kick the others into life

 

[Unregistered]

Thanks very much and that seems to have helped for the moment. Any ideas on the underlying problem?

 

[Unregistered]

Sorry Sheedy, the boiler is a worcester greenstar ri. T'internet says it's not a combi.
I will look up balancing rads as I've never done it before, is it easy to do for a noob like me?

 

[rpm]

Put balancing radiators or rads in the search box, pretty sure croppie posted a good how-to......