How much does it cost to fix Baxi error code Burner On light off?

Typical repair cost for the Baxi Burner On light off fault is £120-350 including labour.

Burner On light off High

Baxi Burner On light off Fault Code

Q: What does the Baxi Burner On light off fault code mean?

Your boiler has reached its maximum safe temperature and has shut down the burner to prevent overheating, or there is an internal electrical fault.

Also written as BURNERONLIGHTOFF — same fault.

The Baxi Burner On light off fault code means: your boiler has reached its maximum safe temperature and has shut down the burner to prevent overheating, or there is an internal electrical fault.. It appears on 2 Baxi models in our database.

Technical description: Flow reaches 80-84°C / Potentiometer failure / PCB failure

Typical repair cost £120-350 (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 Burner On light off fault code

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

Source

Baxi Burner On light off 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