BoilerFaultCodes 176 High
Boiler Fault Code 176
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 176 appears across 2 boiler brands and 8 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning The boiler has stopped because the water it produces when it burns gas is not draining away properly, so it has backed up and shut itself down to stay safe. (As reported on Viessmann Vitodens 100-W B1HF-11)
Pick your boiler brand for the 176 fix
Source
Information for the 176 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 31 August 2026