Recently made a pipe repair to my central heating system, using some Polypipe. When I turned on the heating once again, the ground floor radiators were fully heated but the two bedroom radiators are only up to temperature at the bottom third. The bathroom towl rail appears to be fully filled. With my limited knowledge I bled the two but no air at all came out or water for that matter!
I have a Worcester combi-boiler and no water tank, so the water only circulates on demand (I believe!).
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