Firebird Popular Fault codes & diagnostics

1 fault code with plain-English explanations, severity ratings, DIY guidance, and repair cost estimates.

Regular Oil 20-26 kW Discontinued
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Fault codes

All 1 documented codes

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E2

Your boiler has detected an issue with the sensor that monitors the temperature of the exhaust gases, causing the system to shut down as a safety precaution.

High Engineer only £120-190

Parts commonly replaced

  • Flue Thermistor (NTC Sensor)
  • Wiring Harness

Related codes

Full explanation for E2