BoilerFaultCodes 12-13 High
Boiler Fault Code 12-13
Also written as 1213 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 12-13 appears across 1 boiler brand and 3 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.
Most common meaning Your boiler is failing to light or keep a flame going, which means your heating and hot water have stopped working. (As reported on Remeha Gas 350)
Pick your boiler brand for the 12-13 fix
Source
Information for the 12-13 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