How much does it cost to fix Baxi error code 3 bar or greater?

Typical repair cost for the Baxi 3 bar or greater fault is £120-250 including labour.

3 bar or greater Emergency

Baxi 3 bar or greater Fault Code

Q: What does the Baxi 3 bar or greater fault code mean?

Your boiler's internal water pressure has climbed too high, causing a safety valve to release water to prevent damage inside the unit.

Also written as 3BARORGREATER — same fault.

The Baxi 3 bar or greater fault code means: your boiler's internal water pressure has climbed too high, causing a safety valve to release water to prevent damage inside the unit.. It appears on 1 Baxi model in our database.

Technical description: A pressure of 3 bar or greater indicates a fault. The safety pressure relief valve will operate at a pressure of 3 bar.

Typical repair cost £120-250 (including labour)

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 3 bar or greater fault code

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

130 HE (range) Repair: £120-250

Source

Baxi 3 bar 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 27 April 2026