How much does it cost to fix boiler error code A02?

Typical repair cost for the boiler A02 fault is £120-£350 including labour.

A02 High

Boiler Fault Code A02

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code A02 appears across 4 boiler brands and 25 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler thinks it sees a flame even though it hasn't started the burner yet, which is a safety conflict that prevents it from running. (As reported on Ferroli Modena HE)

Pick your boiler brand for the A02 fix

Ariston A02 10 models Ferroli A02 12 models Potterton A02 2 models Vokera A02 1 model

Source

Information for the A02 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