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

Typical repair cost for the boiler UA-64 fault is £120-450 including labour.

UA-64 High

Boiler Fault Code UA-64

Also written as UA64 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code UA-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's computer memory card is experiencing a communication error or has failed during an internal update, causing the system to stop working. (As reported on Daikin D2CND)

Pick your boiler brand for the UA-64 fix

Daikin UA-64 1 model

Source

Information for the UA-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