BoilerFaultCodes 411 High
Boiler Fault Code 411
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 411 appears across 2 boiler brands 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's internal computer has encountered a critical electronic error and can no longer communicate with the rest of the system. (As reported on Ideal Ideal Classic SE15P FF)
Pick your boiler brand for the 411 fix
Source
Information for the 411 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 27 April 2026