When heating is turned on lots of buzzing coming from diverter valve ( this is a grey square box, Siemens, fitted close to the pump ) and heating takes between 30mins and an hour to fire up.
Is the problem likely to be with the diverter valve or the pump ??? and any solutions ??
Thanks in anticipation..
Is the problem likely to be with the diverter valve or the pump ??? and any solutions ??
Thanks in anticipation..