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

Typical repair cost for the Baxi Pilot On light on fault is £90-180 including labour.

Pilot On light on High

Baxi Pilot On light on Fault Code

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

Your boiler is signalling that the internal starter flame is active, but if the boiler isn't firing up, it means the main burner hasn't received the signal to fully ignite.

Also written as PILOTONLIGHTON — same fault.

The Baxi Pilot On light on fault code means: your boiler is signalling that the internal starter flame is active, but if the boiler isn't firing up, it means the main burner hasn't received the signal to fully ignite.. It appears on 2 Baxi models in our database.

Technical description: Indicates the pilot burner status; if not lit, check electrode, gas pressure, and pilot injector.

Typical repair cost £90-180 (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 light on fault code

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

Source

Baxi Pilot On light 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