BoilerFaultCodes 290 High
Boiler Fault Code 290
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 290 appears across 2 boiler brands and 6 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 an internal electrical communication error on its main circuit board, meaning it cannot process sensor data correctly and has stopped working to prevent further damage. (As reported on Worcester Bosch Greenstar 12i System)
Pick your boiler brand for the 290 fix
Source
Information for the 290 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