BoilerFaultCodes E598 Low
Boiler Fault Code E598
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E598 appears across 1 boiler brand 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's internal clock has lost its settings, which usually means the system cannot keep time to manage your heating schedule correctly. (As reported on Navien NCB 28 HE)
Pick your boiler brand for the E598 fix
Source
Information for the E598 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