Boiler Fault Code Vitodens 100-W

Also written as VITODENS100W — same fault.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026

Fault code Vitodens 100-W appears across 1 boiler brand and 5 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has stopped heating because the burner has shut down to prevent damage, often due to a communication error between the internal components. (As reported on Viessmann A8)