BoilerFaultCodes 289 High
Boiler Fault Code 289
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 289 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 has lost its connection to the sensor that monitors internal water pressure, meaning it cannot safely confirm there is enough water to operate. (As reported on Worcester Bosch Greenstar 12i System)
Pick your boiler brand for the 289 fix
Source
Information for the 289 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 31 August 2026