Saunier Duval Opalia F24E Fault codes & diagnostics

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

Combi Natural Gas 24 kW Discontinued

This boiler uses indicator light combinations

Note which lights are on, off, or flashing and at what speed. Match the combination to the cards below. Do not reset until you have noted the pattern. How to read fault codes →

Just want the most common Saunier Duval Opalia F24E faults?
The top 6 problems in plain English — with causes, DIY checks and repair costs.
Fault codes

All 3 documented codes

Tap any card for details

LED / flash-pattern codes
Safety indicator (4) lights

Your boiler has detected a safety fault and shut itself down to prevent any potential danger.

Emergency Engineer only £120-250

Parts commonly replaced

  • Flue fan
  • Air pressure switch
  • Overheat thermostat sensor
  • Printed Circuit Board (PCB)
Full explanation for Safety indicator (4) lights
Digital codes
Fault finding (Page 9 - 10)

Since the specific manual pages were missing, we cannot identify the exact fault, but your boiler has detected an internal issue that is preventing it from operating correctly.

High Engineer only £120-300

Parts commonly replaced

  • Ignition electrode
  • Gas valve
  • Control PCB
  • Pressure sensor
Full explanation for Fault finding (Page 9 - 10)
Safety disconnection (General)

Your boiler has detected an issue preventing it from igniting, resulting in a loss of hot water service.

High Engineer only £120-250

Parts commonly replaced

  • Gas valve
  • Ignition electrode
  • Printed circuit board
Full explanation for Safety disconnection (General)