How much does it cost to fix Baxi error code Overheat (Red LED)?

Typical repair cost for the Baxi Overheat (Red LED) fault is £120-250 including labour.

Overheat (Red LED) High

Baxi Overheat (Red LED) Fault Code

Q: What does the Baxi Overheat (Red LED) fault code mean?

Your boiler has detected that it is running too hot and has automatically shut itself down to prevent damage.

Also written as OVERHEATREDLED — same fault.

The Baxi Overheat (Red LED) fault code means: your boiler has detected that it is running too hot and has automatically shut itself down to prevent damage.. It appears on 2 Baxi models in our database.

Technical description: The Red LED will illuminate if the overheat thermostat has operated.

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 (Red LED) fault code

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

Source

Baxi Overheat (Red LED) 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