Hot water heating - primary circuit

[AGTKin]

I have a pumped primary to my h/w cylinder. I lost some water from the heating system when I removed a rad and capped the pipework to it. I now find that the central heating circuit works fine but the h/w circuit does not. The pump is very hot but the pipework around it is not. Has the pump failed or does the problem lie elsewhere?

[mike ring]

[e-mail] (AGTKin) wrote in news: [e-mail]:

You may have an airlock in the cylinder primary, due to losing water in the work

There may be a bleed valve at the highest point in the circuit, which you can use, or manualy open the three port valve to allow water into the cylinder circuit.

HTH

mike