BoilerFaultCodes Et Low
Boiler Fault Code Et
Also written as ET — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Et 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 set to provide hot water but not central heating, often because the summer operation mode has been activated. (As reported on Daikin EKOMB 22 Combi)
Pick your boiler brand for the Et fix
Source
Information for the Et 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