BoilerFaultCodes 10-11 Emergency
Boiler Fault Code 10-11
Also written as 1011 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 10-11 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 has detected that a gas valve inside the unit is not closing properly, preventing it from safely starting the ignition process. (As reported on Remeha Gas 350)
Pick your boiler brand for the 10-11 fix
Source
Information for the 10-11 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