BoilerFaultCodes 4070 High
Boiler Fault Code 4070
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code 4070 appears across 1 boiler brand and 4 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 the water temperature is too high and has shut down to prevent damage to its internal components. (As reported on Vokera Evolve)
Pick your boiler brand for the 4070 fix
Source
Information for the 4070 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