How much does it cost to fix boiler error code 1J-64?

Typical repair cost for the boiler 1J-64 fault is £100-250 including labour.

1J-64 High

Boiler Fault Code 1J-64

Also written as 1J64 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 1J-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 has shut down because it has detected it is getting too hot, often due to low water pressure or poor circulation. (As reported on Daikin D2CND)

Pick your boiler brand for the 1J-64 fix

Daikin 1J-64 1 model

Source

Information for the 1J-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