How much does it cost to fix boiler error code Operation lights flashing?

Typical repair cost for the boiler Operation lights flashing fault is £100-280 including labour.

Operation lights flashing High

Boiler Fault Code Operation lights flashing

Also written as OPERATIONLIGHTSFLASHING — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Operation lights 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 is starting up briefly but then switching itself off because it is struggling to safely expel waste gases or drain excess condensation. (As reported on Biasi Riva Compact HE M96a)

Pick your boiler brand for the Operation lights flashing fix

Biasi Operation lights flashing 1 model

Source

Information for the Operation lights 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