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

Typical repair cost for the Baxi Overheat light fault is £100-300 including labour.

Overheat light High

Baxi Overheat light Fault Code

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

Your boiler has become too hot and has automatically shut down as a safety precaution to prevent damage.

Also written as OVERHEATLIGHT — same fault.

The Baxi Overheat light fault code means: your boiler has become too hot and has automatically shut down as a safety precaution to prevent damage.. It appears on 3 Baxi models in our database.

Technical description: The "overheat" indicator light will be illuminated if the appliance needs resetting. Any interruption to the electricity supply may cause the device to operate. Indicates an appliance or system fault if persistent.

Typical repair cost £100-300 (including labour)

DIY fix possible

Locate the thermostat control knob on the boiler front panel.Turn the knob fully anticlockwise to the 'OFF' position.Wait 10 seconds, then turn the knob back to your desired temperature setting to reset the light.

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Baxi models that show the Overheat light fault code

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

Source

Baxi Overheat light 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