BoilerFaultCodes 164 261 Medium
Boiler Fault Code 164 261
Also written as 164261 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 164 261 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 is signalling a fault with a internal seal which could lead to a water leak or pressure loss inside the unit. (As reported on Ariston Excalibur)
Pick your boiler brand for the 164 261 fix
Source
Information for the 164 261 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