Firebird Enviro Fault codes & diagnostics

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

System Oil 20-26 kW 2013-present
Download the Firebird Enviro manualThe official installation and service manual (PDF), the document these fault codes were read from. PDF

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Fault codes

All 2 documented codes

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E1

Your boiler's internal temperature sensor has stopped working correctly, causing the system to shut down for safety.

High DIY-safe £120-190

What to check first

  1. Locate the reset button on the control panel
  2. Use a small pin or paperclip to press the reset hole for a few seconds
  3. Wait for the boiler to restart; if the error returns immediately, you will need a professional

Parts commonly replaced

  • Control thermistor (NTC sensor)
  • Flow/Return sensor

Related codes

Full explanation for E1
E5

Your boiler's burner has stopped firing for safety reasons, which means you currently have no heating or hot water.

High DIY-safe £100-250

What to check first

  1. Locate the reset button on the burner motor itself (usually behind the front casing) and press it once.
  2. Press the reset button on the main digital control panel.
  3. Check that you have fuel in your oil tank and that the isolation valve is open.

Parts commonly replaced

  • Photocell
  • Oil nozzle
  • Fuel pump
  • Control box

Related codes

Full explanation for E5
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