Radiator is only partly warm?

cold at the top means air in rad, just bleed it and check pressure afterwards if it's a sealed system.

Ian
August 2009

when your heating is on and you get cool spots in radiator there is dirt on the system or the radiator is the last on the heating circut then the system need to be balance turn off rads near boiler and see if rads heats up better if not it dirt in system

brian dunne
August 2009

Yes you have air in this radiator which will have to be bled out. Undo the square bleed valve at the top (don't take it right out) listen for the air to escape and close it again once all the air has gone. If you have a combi boiler, the system may need repressurising afterwards.

John
August 2009