How much does it cost to fix boiler error code 23E?

Typical repair cost for the boiler 23E fault is £90-180 including labour.

23E High

Boiler Fault Code 23E

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 23E appears across 1 boiler brand and 7 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 the sensor that monitors exhaust gases, and it has shut down as a safety precaution. (As reported on Ravenheat HE 80/90 / 25-30s)

Pick your boiler brand for the 23E fix

Ravenheat 23E 7 models

Source

Information for the 23E 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