Boiler Fault Code 26.0

Also written as 260 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 7 July 2026

Fault code 26.0 appears across 1 boiler brand and 8 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is displaying a technical setting that indicates it is currently locked to its maximum heating capacity, which usually suggests a configuration or electronic control board error rather than a physical breakdown. (As reported on Grant Vortex Eco)