How much does it cost to fix boiler error code Flashing 0.3 bar?

Typical repair cost for the boiler Flashing 0.3 bar fault is £0-120 including labour.

Flashing 0.3 bar High

Boiler Fault Code Flashing 0.3 bar

Also written as FLASHING03BAR — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Flashing 0.3 bar appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler’s water levels have dropped too low for it to start up safely. (As reported on Glow-worm Xtramax HE)

Pick your boiler brand for the Flashing 0.3 bar fix

Glow-worm Flashing 0.3 bar 1 model

Source

Information for the Flashing 0.3 bar fault code is sourced from the official service / installation manual for each model that displays it. Read more about how we source fault codes →

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