How much does it cost to fix Baxi error code Neon 11?

Typical repair cost for the Baxi Neon 11 fault is £90-160 including labour.

Neon 11 High

Baxi Neon 11 Fault Code

Q: What does the Baxi Neon 11 fault code mean?

Your boiler has detected a problem with the internal thermometer that monitors your radiators, causing the system to stop working to avoid overheating.

Also written as NEON11 — same fault.

The Baxi Neon 11 fault code means: your boiler has detected a problem with the internal thermometer that monitors your radiators, causing the system to stop working to avoid overheating.. It appears on 1 Baxi model in our database.

Technical description: Fault on Central Heating Sensor

Typical repair cost £90-160 (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 Neon 11 fault code

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

Bahama 80e / 105e Repair: £90-160

Source

Baxi Neon 11 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