BoilerFaultCodes CM030 Low
Boiler Fault Code CM030
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code CM030 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 This code is simply displaying the current temperature inside your home rather than indicating a fault with your boiler. (As reported on Baxi 400 Combi 2)
Pick your boiler brand for the CM030 fix
Source
Information for the CM030 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