BoilerFaultCodes E077 Medium
Boiler Fault Code E077
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E077 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 an issue with the sensor that monitors the water temperature in your main heating circuit, which may prevent your radiators from warming up correctly. (As reported on Vokera Evolve)
Pick your boiler brand for the E077 fix
Source
Information for the E077 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