Constant Bleeding

[PA38]

Hi I have a new 600X600 radiator in my bathroom, it replaced an old one that always needed bleeding (cold at top warm at bottom, lot's of air inside) I thought it was due to internal corrosion because it was an old radiator.
I have fitted a new radiator and this one is doing the same, it's the only one in the house that needs constant bleeding, about every two weeks!!!
Anyone got any ideas???

 

[gas4you]

What system have you got.

Sounds like it could be sucking in from the open vent if you have one, or you may have a hidden leak so the system is constantly getting topped up with fresh water.

 

[namsag]

Heating should always be bled with the heating off. Otherwise you may suck air in making the problem worse..

 

[JohnD]

it might be positioned where it catches all the gas from the system.

I know someone where a bedroom rad directly above the boiler does this (vent pipe is along a corridor).

It also helps to give the system a clean and, on final refill, add corrosion inhibitor, unless you know this has recently been done.

 

[Soggy_weetabix]

Your open vent and cold feed positions are critical here. Ingress of air due to poor system design will generally gather in closest rad to pump. As a temporary measure, place a baloon over the open vent and see if the problem stops.

Dave