Boiler Fault Code Display Flashing

Also written as DISPLAYFLASHING — same fault.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026

Fault code Display Flashing appears across 1 boiler brand and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has stopped working because it cannot start the flame or the water pressure inside the system is too low. (As reported on Ferroli Optimax)