BoilerFaultCodes 181 Low
Boiler Fault Code 181
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 181 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 This is a normal operational message and not an actual fault; it simply appears for a moment when the boiler finishes its initial setup or test sequence. (As reported on Atag iC Economiser Plus)
Pick your boiler brand for the 181 fix
Source
Information for the 181 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