How much does it cost to fix Baxi error code Orange light (third)?

Typical repair cost for the Baxi Orange light (third) fault is £90-180 including labour.

Orange light (third) High

Baxi Orange light (third) Fault Code

Q: What does the Baxi Orange light (third) fault code mean?

Your boiler is attempting to light the main burner but the gas is failing to ignite, causing it to spark continuously without firing up.

Also written as ORANGELIGHTTHIRD — same fault.

The Baxi Orange light (third) fault code means: your boiler is attempting to light the main burner but the gas is failing to ignite, causing it to spark continuously without firing up.. It appears on 2 Baxi models in our database.

Technical description: Boiler thermostat turned on - third orange light illuminates and spark generator operates

Typical repair cost £90-180 (including labour)

DIY fix possible

Check that your gas supply is turned on at the meterEnsure the pilot light is lit through the viewing windowIf the pilot is out, follow the manual to relight it using the grey control button

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Baxi models that show the Orange light (third) fault code

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

Source

Baxi Orange light (third) 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