BoilerFaultCodes b/E 18 High
Boiler Fault Code b/E 18
Also written as BE18 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code b/E 18 appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is unable to move water around the system because the pump is stuck or a valve has been accidentally closed. (As reported on Vokera Hydra)
Pick your boiler brand for the b/E 18 fix
Source
Information for the b/E 18 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