Ferroli Pegasus 67 107 2S Fault codes & diagnostics

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

Regular Natural Gas 67-107 kW Discontinued
Download the Ferroli Pegasus 67 107 2S manual The official installation & service manual (PDF) — the exact document these fault codes were verified against. PDF

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Just want the most common Ferroli Pegasus 67 107 2S 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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Explosion at burner

Your boiler is struggling to light its flame smoothly, causing a small, audible 'thump' or pop when the gas finally catches. This indicates a combustion issue that requires immediate professional attention to ensure the system is burning safely.

Emergency Engineer only £120-250 Community-sourced, unverified

Parts commonly replaced

  • Ignition electrode
  • Gas valve
  • Burner assembly
Full explanation for Explosion at burner
Fume thermostat activation

Your boiler has detected that waste gases are not being cleared away properly, so it has safely shut itself down to prevent dangerous fumes from entering your home.

Emergency Engineer only £120-250 Community-sourced, unverified

Parts commonly replaced

  • Fume thermostat
  • Flue assembly
  • Fan
Full explanation for Fume thermostat activation
Smell of unburnt gas

You are detecting unburnt gas, which indicates a serious safety risk that requires immediate professional intervention.

Emergency Engineer only £150-350 Community-sourced, unverified

Parts commonly replaced

  • Gas valve
  • Burner assembly
  • Flue seals
Full explanation for Smell of unburnt gas