Old rad only getting warm on one side, whats the problem?

[Simon-7613]

Hi all, we moved into a new apartment in the summer and now it's cold and the heating is on I've noticed that one of the rads is only getting hot on one side as shown in the photos.

Does anyone have any ideas what the problem could be and what the solution is? Thanks in advance!

 

[sammathias]

What i said.

 

[king of pipes]

Needs repiping tboe the plug can be drilled and tapped for a manual air vent . kop

 

[Simon-7613]

I’ve now tried turning off or down the other rads with the exception of this one where I’ve opened the Trv fully and closed in slightly the 'exit' valve and the middle fin is starting to feel warmer now, more at the bottom than the top. If this is dislodging and moving any 'gunk', does this get filtered out somewhere or does it just move around the system?

Cheers

 

[king of pipes]

It will move around , kop

 

[sammathias]

Sounds like just air to me. If you left bottom valve open. Turn off top valve then crack open top nut where it fixes to the rad you may find it will release alot of air.(use a container of some sort tho. You will have some water)

 

[Stigster]

I may be wrong on this one but didn't these old rads come with a diverter insert to be installed in the rad when piping up same side flow/return like this one is? If so maybe they never fitted it?