96 High

Boiler Fault Code 96

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code 96 appears across 3 boiler brands and 15 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has detected an issue with the electrical power supply coming into your home, meaning the electrical timing does not match what the boiler requires to run safely. (As reported on Biasi Antares Combi)

Pick your boiler brand for the 96 fix

Alpha 96 10 models Biasi 96 4 models Vaillant 96 1 model

Source

Information for the 96 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 27 April 2026