View the thread, titled "Pump staying on at night. Faulty PCB relay or HPA2 m/switch - or ?" which is posted in UK Plumbers Forums on UK Plumbers Forums.
Roger that Harvest. At least it was worth trying to get a diagnosis via the Forum. Thanks everybody for chipping in.
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Reply to the thread, titled "Pump staying on at night. Faulty PCB relay or HPA2 m/switch - or ?" which is posted in UK Plumbers Forums on Plumbers Forums.