BoilerFaultCodes A70 High
Boiler Fault Code A70
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code A70 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 struggling to accurately measure the temperature of your hot water, which means it will likely stop providing hot water to your taps until the faulty sensor is replaced. (As reported on Vokera Easi-Heat I)
Pick your boiler brand for the A70 fix
Source
Information for the A70 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