é8 High

Boiler Fault Code é8

Also written as 8 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code é8 appears across 8 boiler brands and 20 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 internal fan responsible for venting exhaust gases safely is either not spinning or communicating properly, so it has shut down to keep your home safe. (As reported on Remeha Avanta 18V)

Pick your boiler brand for the é8 fix

Atmos é8 4 models Biasi é8 2 models Daikin é8 3 models Pro é8 1 model Remeha é8 3 models Unical é8 2 models Viessmann é8 1 model Worcester Bosch é8 4 models

Source

Information for the é8 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