BoilerFaultCodes E088 High
Boiler Fault Code E088
Reviewed by the BoilerFaultCodes Editorial Team Last reviewed
Fault code E088 appears across 1 boiler brand and 9 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 internal communication error between its main control boards, meaning the system cannot coordinate its functions correctly. (As reported on Vokera Synergy Combi)
Pick your boiler brand for the E088 fix
Source
Information for the E088 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