BoilerFaultCodes Spark does not stop High
Boiler Fault Code Spark does not stop
Also written as SPARKDOESNOTSTOP — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code Spark does not stop 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 is struggling to confirm that the pilot light has successfully ignited, causing it to keep clicking as if trying to start repeatedly. (As reported on Saunier Duval Xeon 120 FF)
Pick your boiler brand for the Spark does not stop fix
Source
Information for the Spark does not stop 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