Cold rad

[Deansplit]

Have a rad which has cold spot on one side and most of the bottom. Have bled and no air comes out, so what is causing the cold areas? It's one of the top rads in house so presumed it was air, but the bleed key is on the hot side so is it poss that it is indeed air but it's not finding its way out? It's a pressurised system.

Thx

 

[Hugh Jaleak]

Did you get any water come out when bleeding the affected rad?

 

[danplumb]

Most likely sludge in your rad if its cold at the bottom in the middle, are any other of ur rads similar to this ? try balancing the system if not take the rad of and run a hosepipe through it, if still nothing try a powerflush.

 

[Deansplit]

It's a brand new rad and new system with new inhibitor, can't be sludge can it? It's so annoying as there are 2 more rads on the same level which work fine. I shut them off to test and it def made it hotter but it's not consistent, sometimes it's hotter than other times. TRV is on max but nothing. I did hear bubbling and keep bleeding but minimal air co,mes out, if not none. When air did come come out it seemed to get hotter in places but no where near even 50%!...?

 

[Hugh Jaleak]

Could be a balancing issue hence my first question.

 

[Deansplit]

Could be a balancing issue hence my first question.

Read more: //www.diynot.com/forums/plumbing/cold-rad.301433/#2201830#ixzz1f30ZKOga

Sorry didn't see your initial reply... yes water comes out immediately most times, only the odd time a bit of air, v minimal.

This is the rad in question (in case the unusual shape has any bearing?)
http://www.victorianplumbing.co.uk/...signer-Radiator-1500-x-350mm-White-HLW26.aspx

If I cracked open the TRV/lock shield to rad nut, would any trapped air be better released?