How much does it cost to fix boiler error code 2.65?

Typical repair cost for the boiler 2.65 fault is £150-300 including labour.

2.65 High

Boiler Fault Code 2.65

Also written as 265 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 7 July 2026

Fault code 2.65 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 an internal communication or software issue that is preventing it from operating correctly. (As reported on Johnson Starley Aquair S 10)

Pick your boiler brand for the 2.65 fix

Johnson Starley 2.65 1 model

Source

Information for the 2.65 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