Firebird Super Q90 Fault codes & diagnostics

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

Regular Oil 26 kW Discontinued

Replaced by: Firebird Enviromax

Download the Firebird Super Q90 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 →

Fault codes

All 2 documented codes

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Lock-out

Your boiler has stopped working because the burner failed to light within the required time, and you will need to manually reset it to attempt a restart.

High Engineer only £120-250

Parts commonly replaced

  • Photocell
  • Ignition electrodes
  • Oil burner pump
  • Control box

Related codes

Full explanation for Lock-out
RED LIGHT

Your boiler has stopped working because it failed to light or stay lit, triggering a safety shut-off to prevent any issues.

High Engineer only £120-250

Parts commonly replaced

  • Photocell
  • Ignition Transformer
  • Oil Pump
  • Control Box
Full explanation for RED LIGHT