How much does it cost to fix boiler error code A.02.54?

Typical repair cost for the boiler A.02.54 fault is £120-250 including labour.

A.02.54 Medium

Boiler Fault Code A.02.54

Also written as A0254 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code A.02.54 appears across 1 boiler brand 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 is having trouble communicating with your thermostat, which is preventing it from receiving instructions on when to turn the heating or hot water on. (As reported on Baxi 600 Combi 2)

Pick your boiler brand for the A.02.54 fix

Baxi A.02.54 5 models

Source

Information for the A.02.54 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 7 July 2026