How much does it cost to fix Firebird error code E5?

Typical repair cost for the Firebird E5 fault is £120-350 including labour.

E5 High

Firebird E5 Fault Code

Q: What does the Firebird E5 fault code mean?

Your boiler's burner has stopped working and has entered a safety lockout mode, meaning the heating and hot water will not function until it is reset or repaired.

The Firebird E5 fault code means: your boiler's burner has stopped working and has entered a safety lockout mode, meaning the heating and hot water will not function until it is reset or repaired.. It appears on 8 Firebird models in our database.

Technical description: Burner fault (possibly burner lockout)

Typical repair cost £120-350 (including labour)

DIY fix possible

Check that there is enough heating oil in your storage tank.Ensure the oil supply valves are fully open.Press the illuminated manual reset button on the burner once (if it fails to start after one try, do not keep pressing it).

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Firebird models that show the E5 fault code

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

Source

Firebird E5 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