BoilerFaultCodes 116 Medium
Boiler Fault Code 116
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 116 appears across 2 boiler brands and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has detected that a safety switch associated with your underfloor heating system has tripped or disconnected, causing the system to pause to prevent overheating. (As reported on Ariston Clas One)
Pick your boiler brand for the 116 fix
Source
Information for the 116 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