How much does it cost to fix Baxi error code E.02 – .17?

Typical repair cost for the Baxi E.02 – .17 fault is £180-350 including labour.

E.02 – .17 High

Baxi E.02 – .17 Fault Code

Q: What does the Baxi E.02 – .17 fault code mean?

Your boiler's computer has lost touch with the internal components that control the gas flow, meaning it cannot safely light the burner.

Also written as E0217 — same fault.

The Baxi E.02 – .17 fault code means: your boiler's computer has lost touch with the internal components that control the gas flow, meaning it cannot safely light the burner.. It appears on 24 Baxi models in our database.

Technical description: Loss of communication between gas valve and boiler printed circuit board (PCB) or fault in air/gas unit.

What causes the Baxi E.02 – .17 fault?

This fault occurs when the boiler's main control board can no longer send or receive signals from the gas valve assembly. It is usually caused by a loose connection in the internal wiring or a critical electronic failure within the gas valve itself, which prevents the system from safely managing the fuel flow. Without this constant communication link, the boiler enters a safety mode to ensure no unburned gas enters the system.

Typical repair cost £180-350 (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 E.02 – .17 fault code

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

Source

Baxi E.02 – .17 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