Glow worm beta on 30oc

[Lisa Breakwell]

Hi. My glow worm boiler 40 light keeps flashing symbol is of a tap and exclamation mark. Does anyone know what this means or how to fix it. Also hot water not heating up hot. Thank you

 

[nwgs]

Hi. My glow worm boiler 40 light keeps flashing symbol is of a tap and exclamation mark. Does anyone know what this means or how to fix it. Also hot water not heating up hot. Thank you

Hot water ntc is faulty