Thanks ScottishGasMan what you say makes very good sense - would I need to remove the Hydraulic inlet assembly to get at the float ? Its very inaccessible - and what would you recommend removing in order to get at the inlet assembly ?
This is an intermittent problem which is gradually getting worse.
When any of the hot water outlets is used, however briefly - The Hall effect sensor continues to glow red after the water is switched off. The Green domestic hot water flow light also continues to glow, there is definately no...