BoilerFaultCodes F.013 Medium
Boiler Fault Code F.013
Also written as F013 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code F.013 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 lost the connection to the temperature sensor inside your hot water cylinder, which means it cannot accurately tell if your water is hot enough. (As reported on Vaillant ecoTEC Plus 832)
Pick your boiler brand for the F.013 fix
Source
Information for the F.013 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 7 July 2026