How much does it cost to fix boiler error code Pressure gauge D < 0.5 bar?

Typical repair cost for the boiler Pressure gauge D < 0.5 bar fault is £80-150 including labour.

Pressure gauge D < 0.5 bar High

Boiler Fault Code Pressure gauge D < 0.5 bar

Q: What does the boiler Pressure gauge D < 0.5 bar fault code mean?

Your boiler has switched itself off because the water level inside your heating system has dropped too low to operate safely.

Q: How much does it cost to fix boiler error code Pressure gauge D < 0.5 bar?

Typical repair cost for the boiler Pressure gauge D < 0.5 bar fault is £80-150 including labour.

Also written as PRESSUREGAUGED05BAR — same fault.

Reviewed by the BoilerFaultCodes Editorial Team Last reviewed 27 April 2026

Fault code Pressure gauge D < 0.5 bar appears across 1 boiler brand and 6 models. The exact meaning varies by manufacturer — pick your boiler brand below to see the model-specific fix.

Most common meaning Your boiler has switched itself off because the water level inside your heating system has dropped too low to operate safely. (As reported on Ariston Micro Combi 27 MFFI)

Pick your boiler brand for the Pressure gauge D < 0.5 bar fix

Ariston Pressure gauge D < 0.5 bar 6 models

Source

Information for the Pressure gauge D < 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