Firebird Envirogreen Fault codes & diagnostics

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

Oil 12-73 kW 2024-present
Download the Firebird Envirogreen manual The official installation & service manual (PDF) — the exact document these fault codes were verified against. PDF

The fault code is already on your display

Note it down before pressing reset — resetting clears the code immediately. How to read fault codes →

Just want the most common Firebird Envirogreen faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes

All 3 documented codes

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L2

Your boiler has stopped running because it has locked itself out, usually because it can't draw enough oil or light the flame.

High DIY-safe £120-280

What to check first

  1. Check that you have enough oil in your storage tank
  2. Ensure the oil supply valve is fully open
  3. Press the illuminated reset button on the burner once

Parts commonly replaced

  • Oil nozzle
  • Photocell
  • Fuel pump
  • Oil filter
Full explanation for L2
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