BoilerFaultCodes 50-60-70 (ll-ll-ll) High
Boiler Fault Code 50-60-70 (ll-ll-ll)
Also written as 506070LLLLLL — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 50-60-70 (ll-ll-ll) appears across 1 boiler brand and 4 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has stopped working because a sensor that measures the temperature of the water circulating to your radiators is sending an incorrect signal, causing a safety shutdown. (As reported on Ariston Genus 30 Plus)
Pick your boiler brand for the 50-60-70 (ll-ll-ll) fix
Source
Information for the 50-60-70 (ll-ll-ll) 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