Radiator doesn't work. It did work last winter, but it's not been working for the last few months. I at last got round to bleeding it, but there's no air in it. One inlet pipe is warm, but the other is cold. Both taps are on.
My guess is that the taps were turned off in the summer, and they've been turned on now, but the jumper (the bit with the washer on, is that the right name?) has stayed jammed closed. What's the best way to free this without draining the whole system down?
Thanks for any help