How much does it cost to fix boiler error code 408?

Typical repair cost for the boiler 408 fault is £120-280 including labour.

408 High

Boiler Fault Code 408

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 408 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 a problem with how air or water is flowing through the system and has shut down as a safety precaution. (As reported on Ideal Ideal Classic SE15P FF)

Pick your boiler brand for the 408 fix

Ideal 408 1 model

Source

Information for the 408 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