Overheat High

Firebird Overheat Fault Code

Also written as OVERHEAT — same fault.

The Firebird Overheat fault code means: your boiler has become too hot and has automatically shut down for safety.. It appears on 1 Firebird model in our database.

Call an engineer soon

Book a Gas Safe engineer within 24 to 48 hours. Your boiler may be unsafe or could break down completely if left.

Technical description: A boiler overheat condition arises; the burner will stop and remain inoperative until the manual reset overheat limit thermostat reset button is depressed.
Typical repair cost £90-180 (including labour)

DIY fix possible

Wait for the boiler to cool down completely.Unscrew the black plastic cap on the control panel to reveal the reset button.Press the manual reset button firmly and replace the cap.Ensure your radiator valves are open and the system pressure is correct.

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Firebird models that show the Overheat fault code

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

Source

Firebird Overheat fault code information on this page is sourced and cross-checked against the official Firebird service / installation manuals for each affected model.

Reviewed by the BoilerFaultCodes Editorial Team · Last reviewed 27 April 2026