BoilerFaultCodes 161 High
Boiler Fault Code 161
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 161 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's computer memory has encountered a communication error and can no longer process its operating settings. (As reported on Viessmann Vitodens 100-W B1GA)
Pick your boiler brand for the 161 fix
Source
Information for the 161 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