Boiler Fault Code EXPLOSIVE IGNITION

Also written as EXPLOSIVEIGNITION — same fault.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026

Fault code EXPLOSIVE IGNITION appears across 2 boiler brands and 6 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 light smoothly, resulting in a small mini-explosion inside the unit when it finally fires up, which can damage your internal components. (As reported on Chaffoteaux Britony II 50FF)