1 radiator in house cold, pipes into it are cold aswell??

[simon]

yep turn the heating on so that you know when the hot water is being drawn into the rad.If all is good after this it was an airlock problem if not go back to balancing

 

[ogoshi]

What youve got is an old fashioned double entry rad valve.if the valve is fully intact,when you remove the rad(leaving the valves in place on the copper pipes) you would have to slide the rad to one side as these valves have a flexible copper tube attached which fit inside the rad.the tube is three quaters the length of the rad and carries the flow.basically what it does is fires the hot water to the end of the rad,which goes up and down through the rad as it travels back to the return part of the rad valve.
This flexible tube (inside the rad)eventually splits,allowing the flow and return waters to mix before the flow has circulated around the rad.
If there is not a long flexi tube atached to the valve (and inside the rad)
then someone previously has broken it off,(ive never managed to remove a rad from these double valves without breaking them).The only answer is to replace the valve with 2 modern rad valves(1 each end) by extending either flow or return to the far end of the rad.Make sure you know which is flow+return if your going to fit a thermostatic valve at one end.

 

[Jayach]

The rad is no good, get a new one

 

[cocolei]

i have hot water going into and out of radiator and a bleeder behind the radiator but cant get the water to flow . help please