Your boiler is displaying a status message indicating the target temperature for the 'warm start' feature, which keeps water inside the unit pre-heated for faster hot water delivery.

DIY fix possible

Check if the 'C' symbol is displayed on the screen, which indicates warm start is active.Turn the domestic hot water temperature knob fully clockwise to enable or counter-clockwise to disable the feature if preferred.No action is required if your hot water is working normally, as this is an information code rather than a breakdown.