BoilerFaultCodes TCS STATE Low
Boiler Fault Code TCS STATE
Also written as TCSSTATE — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code TCS STATE 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 currently in a normal waiting state because it has reached the required temperature and is managing its own internal heating cycle. (As reported on Ariston Egis 24 MFFI)
Pick your boiler brand for the TCS STATE fix
Source
Information for the TCS STATE 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