BoilerFaultCodes A 13 High
Boiler Fault Code A 13
Also written as A13 — same fault.
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code A 13 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 has lost the connection to a sensor that monitors the temperature of the water being sent to your radiators, which prevents it from heating your home safely. (As reported on Vokera Verve I 50)
Pick your boiler brand for the A 13 fix
Source
Information for the A 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 7 July 2026