You win! Did what you said and switched off other rads. Its warm and no more grief, if you know what i mean!
Thank you so much!
and thanks to everyone else who pitched in with ideas.
The bled water is clear. The water when I opened the connection on the rad to one of the valves came out slightly black. The system is older, say 6plus years, but this rad is part of a new extension. Did not change the pump or the boiler.
Last year (winter) the rad came on and worked fine. I...
I have a rad that remains cold no matter what I do. I can open and close valves at both ends. I can bleed the rad from both valves, I mean I can close the right one and still get pressure from the left to bleed - and I can also close the left valve and bleed by opening the right one.
The right...