BoilerFaultCodesTechnical description
No display, boiler inactive
What causes this fault?
This fault occurs when the boiler's electronic brain loses its power supply or suffers a total electrical failure. It is most commonly caused by a blown internal fuse or a capacitor failure on the main circuit board, which prevents electricity from reaching the display and controls. In some cases, it can also be triggered by a faulty connection between the user interface and the main component board.
This issue often occurs following summer storms or power surges, though it is also common during the first cold snap of winter when the components are suddenly put under increased electrical load.
Engineer required
This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.