Air in the radiators

[serpent]

Hello!

Probably someone had the same problem I have ...

Some time before I was nailing a loose board at the house we just bought and accidently punctured a pipe. Did not know what to do so called an emergency plumber. The guy came, switched off the system and fixed the problem. As he realized afterwards the system was turned off in a wrong way, so there was an air in the system. He bleeds some of the radiators and leaves, but just now I can see that not all of them and I have to fix it somehow myself. The strange thing is that they all are warm at their tops and bottoms, but not in between.

Any ideas how to fix the problem?

 

[Gees]

As hot water rises I cant understand how a rad could be cold in the middle. The only reason I can think of is exessive sludge in the rads?

 

[ChrisR]

Sludge it is. You need a "power flush"

 

[calderdale]

Sludge it is. You need a "power flush"