Always on Radiator

[fountainspring]

Hi,

I have an open vented pumped central heating system with one radiator that is "always on" in the bathroom irrespective of the central hearting pump.

I have replaced the "always on" standard radiator for a chrome towel rail type and moved to an adjacent wall. The chrome towel rail type is around twice as high as the one it replaces.

When I bleed the system the radiator stays "always on" for around 1 day and then goes permanently cold.

Is the problem due to the height of the chrome towel rail radiator or could it be something else.

Thanks for your help.

 

[Bahco]

Sounds like your rad is plumbed to the hot water supply.
Check pipework.

 

[kevplumb]

sounds as if it's an old heat leak
so it will (should) work off gravity

 

[fountainspring]

The old radiator was "always on", I believe this is the way it was designed.

All I did was remove the old radiator, cut the pipes and extend them to the new chrome towel rail type radiator.

 

[kevplumb]

did you make sure thi pipework has a slight rise to the rad

are both valves fully open

 

[fountainspring]

To tell you the truth I dilled two holes in a joist lower down from the pipes original level and passed the pipes through them, then fed them up to the rad valves,

So I guess the pipes drop down from their original level then rise up to the rad.

I thought it would be a better place for the pipes than just under the floorboard.

 

[fountainspring]

Oh and yes both valves are fully open.

Does this type of rad need any special type