Hi , what is the GC number of your boiler please
Hi found the fault code, it is a overheat cut out. This could be to pump not working , blockage or a failed thermostat, but will need some more info to narrow it down , thanks
Hi have you tried resetting?
Ok . if the heating works , it is just the hot water? Then you are looking at a blocked domestic hot water heat exchanger or the hot water temperature thermostat. Replace the stat first as its the cheapest part.
Hi , if happy with your answer coulkd you please rate it , thanks