How much does it cost to fix boiler error code 0 (Flashing)?

Typical repair cost for the boiler 0 (Flashing) fault is £120-250 including labour.

0 (Flashing) High

Boiler Fault Code 0 (Flashing)

Also written as 0FLASHING — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 0 (Flashing) 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 has stopped working because it failed to ignite or got too hot, and it now needs a manual reset to try and start again. (As reported on Potterton Envoy 30)

Pick your boiler brand for the 0 (Flashing) fix

Potterton 0 (Flashing) 1 model

Source

Information for the 0 (Flashing) 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