BoilerFaultCodesTechnical description
A brief power failure has occurred
What causes this fault?
This fault occurs when the boiler detects a momentary break or instability in the mains electricity reaching its control board. It is typically triggered by a local power cut, a tripped circuit breaker, or even flicking the boiler’s isolation switch off and on too quickly. The system stops as a safety precaution to ensure the electronics can reboot correctly.
This code is slightly more frequent during stormy weather or winter months when high winds and ice can cause intermittent fluctuations or 'brownouts' in the local power grid.
DIY fix possible
Press the Reset button on the boiler control panelCheck if there was a recent power cut or if a fuse has tripped in your homeEnsure the boiler's isolation switch is fully in the ON position