Error code circulation fault
Error code E1-25 signals an issue with the circulation of the water within the heating system.
Sometimes this can happen if someone has carried out any works on your boiler recently or you’ve had to top the pressure up and it's not worked since.
Have a look under your boiler to make sure all the correct valves are turned on and in the correct position. The two valves we need to ensure are fully open are the boilers flow and return pipes.
If the valves are in the correct position, there is nothing more to check. You’ll need to report a repair.