Pressure Gauge (below 0.5 bar) High

Boiler Fault Code Pressure Gauge (below 0.5 bar)

Also written as PRESSUREGAUGEBELOW05BAR — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed

Fault code Pressure Gauge (below 0.5 bar) appears across 1 boiler brand and 5 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has stopped working because the water pressure is too low, often caused by a small leak or recently bled radiators. (As reported on Baxi Promax Heat)

Pick your boiler brand for the Pressure Gauge (below 0.5 bar) fix

Baxi Pressure Gauge (below 0.5 bar) 5 models

Source

Information for the Pressure Gauge (below 0.5 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