How much does it cost to fix Baxi error code Pilot On?

Typical repair cost for the Baxi Pilot On fault is £120-220 including labour.

Pilot On High

Baxi Pilot On Fault Code

Q: What does the Baxi Pilot On fault code mean?

Your boiler is struggling to keep its small pilot flame lit, which prevents the main heating system from starting up.

Also written as PILOTON — same fault.

The Baxi Pilot On fault code means: your boiler is struggling to keep its small pilot flame lit, which prevents the main heating system from starting up.. It appears on 3 Baxi models in our database.

Technical description: Indicator light - Check for constant spark at the electrode, pilot injector blockage, and gas pressure

Typical repair cost £120-220 (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 Pilot On fault code

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

Source

Baxi Pilot On 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