BoilerFaultCodes Shorted signal High
Boiler Fault Code Shorted signal
Also written as SHORTEDSIGNAL — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Shorted signal 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 has detected an electrical fault with the sensor that detects the flame, causing it to shut down for safety reasons. (As reported on Potterton Envoy 30)
Pick your boiler brand for the Shorted signal fix
Source
Information for the Shorted signal 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