BoilerFaultCodes 2S02 Medium
Boiler Fault Code 2S02
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 2S02 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 Your boiler is confused by how your heating controls are wired and thinks it should be receiving two different signals to turn on at once. (As reported on Ideal Logic Code Combi ESP1)
Pick your boiler brand for the 2S02 fix
Source
Information for the 2S02 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