BoilerFaultCodes E090 High
Boiler Fault Code E090
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E090 appears across 1 boiler brand and 4 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has sensed that the exhaust fumes are getting too hot and has shut down as a safety precaution to prevent damage. (As reported on Vokera Evolve)
Pick your boiler brand for the E090 fix
Source
Information for the E090 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