BoilerFaultCodes No Switched Live High
Boiler Fault Code No Switched Live
Also written as NOSWITCHEDLIVE — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code No Switched Live appears across 1 boiler brand and 2 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler has completely lost the electrical signal it needs to start running, meaning it is currently unable to provide any heating or hot water. (As reported on Potterton Suprima HE)
Pick your boiler brand for the No Switched Live fix
Source
Information for the No Switched Live 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