BoilerFaultCodes AM018 Low
Boiler Fault Code AM018
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code AM018 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 reading the temperature of the water returning to it, which is a normal part of its internal monitoring process rather than a breakdown. (As reported on Baxi 400 Combi 2)
Pick your boiler brand for the AM018 fix
Source
Information for the AM018 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