BoilerFaultCodes 544 Medium
Boiler Fault Code 544
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 544 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 has lost the signal from a sensor for a secondary heating zone, so it has safely shut off that specific part of your home's heating to prevent overheating. (As reported on Viessmann Vitodens 100-W B1GA)
Pick your boiler brand for the 544 fix
Source
Information for the 544 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