La Cornue
Improper Gas/Air Mixture or Supply Issue
Gas surface burner ignites but flame is weak, yellow, or noisy
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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 orifice for gas type (NG vs LP), Partially blocked burner ports, Regulator not set for correct gas, Low gas pressure from supply
How to Fix / Troubleshooting
Safety first: Turn off burners and allow them to cool. Do not attempt regulator or orifice changes unless you are qualified and have the correct conversion kit.
- Clean burner ports: Remove burner caps and heads. Clean all ports with a soft brush and warm water. Dry completely before reinstalling.
- Check cap placement: Ensure burner caps are correctly seated and not rocking.
- Verify gas type: Confirm that the range has been properly converted for your gas type (natural gas or LP) using a La Cornue conversion kit. Incorrect orifices can cause yellow or noisy flames.
- Regulator setting: The gas pressure regulator must be set for the correct gas. This should be checked and adjusted by a licensed gas technician.
- Supply pressure: If multiple gas appliances show weak flames, have your gas supplier check line pressure.
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Repair Difficulty
Medium
3/5
Required Part
Surface Burner Orifice Kit
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