How much does it cost to fix boiler error code 0U?

Typical repair cost for the boiler 0U fault is £0-120 including labour.

0U Low

Boiler Fault Code 0U

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 0U 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 performing a routine safety check by blowing air through the system to clear any leftover gases before or after it fires up. (As reported on Ideal Maximiser SE)

Pick your boiler brand for the 0U fix

Ideal 0U 1 model

Source

Information for the 0U 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