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Ideal Logic System IE fault F02

Flame loss

Gas boiler

What it means

Boiler has detected loss of flame signal during operation.

Likely causes

  1. No/low gas pressure at boiler inlet
  2. Faulty electrode or harness
  3. Faulty spark generator or harness
  4. No 24Vdc supply to gas valve while flame is on
  5. Wiring fault from gas valve to PCB
  6. Faulty PCB
  7. Blocked condensate pipe or flue
  8. Blocked trap or condensate drain pipe work
  9. Faulty gas valve
  10. Low gas pressure at boiler inlet
  11. Blocked flue
  12. Low gas pressure
  13. Blocked condensate/trap
  14. Flue components not correctly assembled, fixed or supported
  15. Flue or flue terminal obstructed
  16. Seals on flue extensions displaced during installation
  17. Combustion products and inlet air mixing due to flue integrity fault
  18. Gas control valve fault requiring replacement
  19. Faulty gas control valve requiring replacement

Where to start

  1. Check if boiler ignites for a short time and then extinguishes
  2. Check Gas Pressure available at the Boiler Inlet (>18 mbar)
  3. Check if 24Vdc supply is available at the Gas Valve while the flame is on

The full answer, free

  • 37 more checks in order
  • The readings and component tests from the manual
  • How to put it right, step by step
  • The manual page for this fault (page 51), right under the answer
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Safety: Isolate gas and power before you open the case. If you have been into the gas side, do a tightness test, and a combustion and flue check before you hand back. Gas Safe (UK) or RGI (Ireland) work only.

From the Ideal manual for the Logic System IE. Check the model on the data plate before you order parts.

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