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Ideal Logic System IE fault F16

Gas valve fault

Gas boiler

What it means

Boiler has detected a fault with the gas valve.

Likely causes

  1. Faulty gas valve wiring
  2. Faulty gas valve
  3. Low gas pressure
  4. Gas valve wiring/PCB fault
  5. Faulty spark generator
  6. Faulty electrode
  7. Blocked condensate/trap
  8. Flue components not correctly assembled, fixed or supported
  9. Flue or flue terminal obstructed
  10. Seals on flue extensions displaced during installation
  11. Combustion products and inlet air mixing due to flue integrity fault
  12. Gas control valve fault requiring replacement
  13. Faulty gas control valve requiring replacement

Where to start

  1. Check gas valve wiring
  2. Restart boiler and check if it ignites briefly then extinguishes
  3. Check gas pressure at boiler inlet is >18 mbar

The full answer, free

  • 33 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 49), 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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