Boiler Fault Code 8.10

Also written as 810 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026

Fault code 8.10 appears across 1 boiler brand and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is failing to shut off the flame when it should, which means it will continue to heat your water or radiators indefinitely. (As reported on Chaffoteaux Britony II 50FF)