BoilerFaultCodes 50/70kW Low
Boiler Fault Code 50/70kW
Also written as 5070KW — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 50/70kW appears across 1 boiler brand and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning This code indicates your boiler is a high-output commercial-grade model and is showing its power rating rather than a fault, meaning the system is operating normally. (As reported on Worcester Bosch Utility)
Pick your boiler brand for the 50/70kW fix
Source
Information for the 50/70kW 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