Boiler Fault Code 布 & 皿 neons flashing

Also written as NEONSFLASHING — same fault.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 31 August 2026

Fault code 布 & 皿 neons flashing appears across 2 boiler brands 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 detected that it is getting too hot and has automatically switched itself off to prevent damage or fire risk. (As reported on Baxi Combi Instant 80/105 HE)