BoilerFaultCodesBaxi Pressure of 3 or greater Fault Code
Also written as PRESSUREOF3ORGREATER — same fault.
The Baxi Pressure of 3 or greater fault code means: your boiler has become dangerously pressurized, which is causing it to automatically release water to prevent a potential rupture.. It appears on 2 Baxi models in our database.
Technical description: A pressure of 3 or greater indicates a fault. The safety pressure relief valve will operate.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
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Baxi models that show the Pressure of 3 or greater fault code
Click a model for the full fault code list and model-specific repair notes.
Source
Baxi Pressure of 3 or greater 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 7 July 2026