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

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

Orange light (single) High

Baxi Orange light (single) Fault Code

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

Your back boiler is receiving a permanent power signal, which usually means the external controls or the internal wiring are telling it to run even when it shouldn't.

Also written as ORANGELIGHTSINGLE — same fault.

The Baxi Orange light (single) fault code means: your back boiler is receiving a permanent power signal, which usually means the external controls or the internal wiring are telling it to run even when it shouldn't.. It appears on 2 Baxi models in our database.

Technical description: Permanent live supplied

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 Orange light (single) fault code

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

Source

Baxi Orange light (single) 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