E25 High

Boiler Fault Code E25

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code E25 appears across 9 boiler brands and 37 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has shut down because it has detected an internal safety issue, likely related to overheating or a lack of water circulation. (As reported on Vokera Condexa Pro)

Pick your boiler brand for the E25 fix

Ariston E25 2 models Baxi E25 5 models Biasi E25 6 models Ferroli E25 1 model Heatline E25 2 models Keston E25 9 models Ravenheat E25 9 models Remeha E25 1 model Vokera E25 2 models

Source

Information for the E25 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