How much does it cost to fix boiler error code 6.2.5?

Typical repair cost for the boiler 6.2.5 fault is £200-400 including labour.

6.2.5 High

Boiler Fault Code 6.2.5

Also written as 625 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code 6.2.5 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 detected a failure in its internal communication or electronic control system, meaning it cannot safely operate. (As reported on Baxi 825 Combi)

Pick your boiler brand for the 6.2.5 fix

Baxi 6.2.5 1 model

Source

Information for the 6.2.5 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