Ariston Egis 24 MFFI Fault codes & diagnostics

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

CombiSystem Natural Gas 24 kW 2005-2010 Discontinued
GC Number 41-116-14

Replaced by: Egis Plus

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All 4 documented codes

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Red L.E.D. I illuminated

Your boiler has failed to start the flame after several attempts and has shut itself down as a safety precaution.

High Engineer only £120-250

Parts commonly replaced

  • Ignition electrode
  • Gas valve
  • Printed Circuit Board

Related codes

Red LED I

Your boiler has stopped working because it failed to light the flame needed to heat the water.

High Engineer only £120-250

Parts commonly replaced

  • Ignition electrode
  • Gas valve
  • Printed Circuit Board (PCB)

Related codes

Red LED I (Overheat)

Your boiler has automatically turned itself off because it has detected that the water inside is getting dangerously hot.

High Engineer only £120-250

Parts commonly replaced

  • NTC sensor
  • Primary heat exchanger
  • Pump

Related codes

Yellow L.E.D. H illuminated

Your boiler has temporarily turned itself off because it is struggling to safely clear away waste gases, which could lead to harmful fumes building up if not addressed.

Emergency Engineer only £120-250

Parts commonly replaced

  • Flue fan
  • Air pressure switch
  • Venturi
  • Flue seals