BoilerFaultCodes Maintenance required Low
Boiler Fault Code Maintenance required
Also written as MAINTENANCEREQUIRED — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Maintenance required appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is simply reminding you that its annual service is due and it needs a routine checkup by a professional. (As reported on Biasi Inovia 2020)
Pick your boiler brand for the Maintenance required fix
Source
Information for the Maintenance required 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