How much does it cost to fix boiler error code JJ-64?

Typical repair cost for the boiler JJ-64 fault is £90-250 including labour.

JJ-64 High

Boiler Fault Code JJ-64

Also written as JJ64 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code JJ-64 appears across 1 boiler brand and 1 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler is not receiving enough electrical power from your home's mains supply to operate safely. (As reported on Daikin D2CND)

Pick your boiler brand for the JJ-64 fix

Daikin JJ-64 1 model

Source

Information for the JJ-64 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