turn off every other rad in the house, open both valves full on the new rad and turn the heating on, if it's not a combi make sure the pump is on speed number 3, this should clear what i think is an air-lock, if all works after this then turn pump back to previous setting and shut down lockshield valve to balance system. (PS do not turn on hot water on programmer when doing this.
keith
October 2009
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