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

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

Overheat High

Baxi Overheat Fault Code

Q: What does the Baxi Overheat fault code mean?

Your boiler has detected that it is running too hot and has automatically switched itself off as a safety precaution to prevent damage.

Also written as OVERHEAT — same fault.

The Baxi Overheat fault code means: your boiler has detected that it is running too hot and has automatically switched itself off as a safety precaution to prevent damage.. It appears on 8 Baxi models in our database.

Technical description: The overheat indicator light will be illuminated if the appliance needs resetting. Shuts down the appliance should the system overheat.

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 fault code

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

Source

Baxi Overheat 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