How much does it cost to fix boiler error code Below 1 bar?

Typical repair cost for the boiler Below 1 bar fault is £70-130 including labour.

Below 1 bar High

Boiler Fault Code Below 1 bar

Also written as BELOW1BAR — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Below 1 bar 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 pressure is currently too low, which means it doesn't have enough water inside to circulate heat around your home. (As reported on Baxi 130 HE (range))

Pick your boiler brand for the Below 1 bar fix

Baxi Below 1 bar 1 model

Source

Information for the Below 1 bar 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