How much does it cost to fix boiler error code E64?

Typical repair cost for the boiler E64 fault is £250-450 including labour.

E64 High

Boiler Fault Code E64

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code E64 appears across 2 boiler brands 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's main brain is experiencing a technical glitch and cannot process its internal instructions, which means it will stop working until the control system is reset or serviced. (As reported on Baxi 130 HE (range))

Pick your boiler brand for the E64 fix

Ariston E64 3 models Baxi E64 1 model

Source

Information for the E64 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