How much does it cost to fix boiler error code U2-01?

Typical repair cost for the boiler U2-01 fault is £80-250 including labour.

U2-01 Low

Boiler Fault Code U2-01

Also written as U201 — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code U2-01 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 detected that the electrical supply coming into the unit is currently too high, which could cause damage to internal parts if left unchecked. (As reported on Daikin D2CND)

Pick your boiler brand for the U2-01 fix

Daikin U2-01 1 model

Source

Information for the U2-01 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