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

Typical repair cost for the Baxi Overheat Neon fault is £120-250 including labour.

Overheat Neon High

Baxi Overheat Neon Fault Code

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

Your boiler has automatically shut itself off because it reached a dangerously high temperature to prevent damage or safety hazards.

Also written as OVERHEATNEON — same fault.

The Baxi Overheat Neon fault code means: your boiler has automatically shut itself off because it reached a dangerously high temperature to prevent damage or safety hazards.. It appears on 3 Baxi models in our database.

Technical description: Indicates that the overheat cut-off device has operated. The boiler is protected by a manual reset overheat thermostat.

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 Overheat Neon fault code

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

Source

Baxi Overheat Neon 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