No hot water (CH working fine). Boiler doesn't have a flow switch/turbine - as demand for hot water comes from NTC on side of thermal store cylinder. Diode B flashing every 5 seconds (indicating normal boiler standby) i.e. boiler doesn't seem to be registering a demand for HW at all.
Changed the NTC on the thermal store; no joy. Had the main PCB checked - it's fine apparently. Wiring on the diverter valve ok. Is it possible that the separate Diverter Valve PCB could be faulty. If it were faulty would that be consistent with no fault indication on the 2 diodes? Or, any other ideas??
Thank you.
Changed the NTC on the thermal store; no joy. Had the main PCB checked - it's fine apparently. Wiring on the diverter valve ok. Is it possible that the separate Diverter Valve PCB could be faulty. If it were faulty would that be consistent with no fault indication on the 2 diodes? Or, any other ideas??
Thank you.
