BoilerFaultCodes 366 Medium
Boiler Fault Code 366
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 366 appears across 2 boiler brands and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has lost connection to the temperature sensor that monitors your room environment, so it cannot accurately tell if your home needs more heat. (As reported on Ideal Logic Air)
Pick your boiler brand for the 366 fix
Source
Information for the 366 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