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Baxi Baxi 600/800/Assure System 2 and 600 Combi 2 platform fault E.04.10

Burner failed to ignite after 4 attempts

Gas boiler

What it means

Burner failed to ignite after 4 attempts

Likely causes

  1. Gas supply pressure issue
  2. Gas valve electrical connection problem
  3. Gas valve calibration incorrect
  4. Electrode fault
  5. Fan fault
  6. Flue gas exhaust blockage
  7. Flue components incorrectly assembled, fixed or supported
  8. Flue or terminal obstructed
  9. Products of combustion and inlet air mixing
  10. Burner seals, internal flue seals, door or case seals unsound
  11. Carbon/soot buildup in heat exchanger
  12. Cracked or damaged burner
  13. Worn burner flange gasket
  14. Damaged front insulation panel
  15. Newly fitted gas valve not yet calibrated
  16. Gas valve out of adjustment
  17. CO2 at minimum heat input out of specified range
  18. CO2 at maximum heat input out of specified range

Where to start

  1. Check the gas supply pressure
  2. Check the gas valve electrical connection
  3. Check the gas valve calibration

The full answer, free

  • 70 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 77), 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 Baxi manual for the Baxi 600/800/Assure System 2 and 600 Combi 2 platform. Check the model on the data plate before you order parts.

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