Keston K50, K60, K80 Fault codes & diagnostics

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

System Natural Gas 50-80 kW Discontinued

Replaced by: Keston Heat

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Fault codes

All 1 documented codes

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E01

Your boiler is failing to light because it cannot detect that the gas has successfully ignited.

High Engineer only £180-350

Parts commonly replaced

  • Ignition electrode
  • Ignition lead
  • Ignition control board
  • Gas valve
Full explanation for E01