Boiler Fault Code 2 flashes

Also written as 2FLASHES — same fault.

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

Fault code 2 flashes 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 temporarily shut down because it has become too hot, usually due to a lack of water flow or a blocked circulation path. (As reported on Baxi 600 Heat)