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

Typical repair cost for the Baxi Orange light (second) fault is £120-250 including labour.

Orange light (second) High

Baxi Orange light (second) Fault Code

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

Your boiler has detected power coming from the thermostat while the main power is also on, which usually means an internal electrical component has failed or stuck.

Also written as ORANGELIGHTSECOND — same fault.

The Baxi Orange light (second) fault code means: your boiler has detected power coming from the thermostat while the main power is also on, which usually means an internal electrical component has failed or stuck.. It appears on 2 Baxi models in our database.

Technical description: Permanent live & switched live supplied

Typical repair cost £120-250 (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 Orange light (second) fault code

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

Source

Baxi Orange light (second) 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