How much does it cost to fix boiler error code F02?

Typical repair cost for the boiler F02 fault is £150-300 including labour.

F02 Emergency

Boiler Fault Code F02

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 31 August 2026

Fault code F02 appears across 4 boiler brands and 5 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 a flame inside when it should be turned off, which is a significant safety precaution that prevents the unit from starting. (As reported on Ferroli Arena 30A)

Pick your boiler brand for the F02 fix

Ferroli F02 2 models Glow-worm F02 1 model Heatline F02 1 model Viessmann F02 1 model

Source

Information for the F02 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 31 August 2026