How much does it cost to fix Baxi error code Pressure Gauge above 3 bar?

Typical repair cost for the Baxi Pressure Gauge above 3 bar fault is £100-220 including labour.

Pressure Gauge above 3 bar High

Baxi Pressure Gauge above 3 bar Fault Code

Q: What does the Baxi Pressure Gauge above 3 bar fault code mean?

Your boiler has too much water inside it, causing the pressure to rise to a level where the safety valve must release the excess to prevent damage.

Also written as PRESSUREGAUGEABOVE3BAR — same fault.

The Baxi Pressure Gauge above 3 bar fault code means: your boiler has too much water inside it, causing the pressure to rise to a level where the safety valve must release the excess to prevent damage.. It appears on 2 Baxi models in our database.

Technical description: The safety pressure valve will operate and a fault is indicated. Contact your installer.

Typical repair cost £100-220 (including labour)

DIY fix possible

Check that the filling loop valves are fully closed and not leaking water into the systemBleed water from a radiator using a bleed key to reduce the system pressureMonitor the pressure gauge until it returns to the normal range, typically between 1 and 1.5 barIf pressure continues to rise after bleeding, call a Gas Safe engineer to inspect the expansion vessel

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Baxi models that show the Pressure Gauge above 3 bar fault code

Click a model for the full fault code list and model-specific repair notes.

Source

Baxi Pressure Gauge above 3 bar fault code information on this page is sourced and cross-checked against the official Baxi service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026