Liebherr Incorrect Combustion / Air-Gas Mixture

Gas burner flame is yellow, sooty, or lifts off the burner

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Incorrect injector for gas type, Blocked primary air inlet, Wrong gas type (LPG vs natural) without conversion, Excessive gas pressure

How to Fix / Troubleshooting

Safety first: Turn off the burner. Sooty or lifting flames can produce carbon monoxide; ensure good ventilation.

User checks:

  • Clean the burner and ensure all parts are correctly assembled.
  • Check that no foil, liners, or debris block the air inlets around the burner base.

Technician checks:

  • Verify the appliance is set up for the correct gas type as indicated on the rating plate.
  • Inspect and, if necessary, replace the injectors with the correct size for the gas type.
  • Check gas pressure and adjust the regulator if fitted.
  • Adjust primary air shutters (if present) to achieve a stable blue flame.
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Repair Difficulty

Medium 3/5

Required Part

Burner Injector Set
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