Boiler Display Is Blank
No lights, no display and no response to any control..
No lights, no display and no response to any control.
What is actually going on
No lights, no display and no response to any control.
The realistic causes, in order
No power to the appliance — a tripped RCD, a spur switch turned off, or a blown fuse in the fused connection unit A failed transformer or power supply section on the PCB A damaged supply cable, sometimes rodent damage in a loft installation
What we test on site
Supply voltage at the boiler's terminal strip Fuse and spur condition Internal supply section of the board once external supply is proven
Questions we get asked
What causes a blank boiler display on a gas boiler?
No power to the appliance — a tripped RCD, a spur switch turned off, or a blown fuse in the fused connection unit
What normally puts a blank boiler display right?
External supply faults are quick to fix; a failed board section is a component replacement with re-commissioning afterwards.
Is it safe to keep using the system with a blank boiler display?
If the RCD trips again immediately after resetting, stop. That indicates an earth fault that needs proper investigation, not repeated resetting.