How much does it cost to fix boiler error code 3 bar or greater?

Typical repair cost for the boiler 3 bar or greater fault is £120-250 including labour.

3 bar or greater Emergency

Boiler Fault Code 3 bar or greater

Also written as 3BARORGREATER — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code 3 bar or greater 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 internal water pressure has climbed too high, causing a safety valve to release water to prevent damage inside the unit. (As reported on Baxi 130 HE (range))

Pick your boiler brand for the 3 bar or greater fix

Baxi 3 bar or greater 1 model

Source

Information for the 3 bar or greater 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