DeLonghi Incorrect Gas-Air Mixture / Burner Adjustment Issue

Gas cooktop burner flame is yellow, noisy, or lifts off the burner ports.

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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

Burner cap misaligned, Blocked primary air intake, Incorrect gas type or pressure (e.g., LPG vs natural gas), Regulator or injector (jet) mismatch

How to Fix / Troubleshooting

Safety first: Turn off the burner and allow it to cool. Do not attempt gas pressure adjustments without proper tools and training.

  • Re-seat burner cap: Ensure the burner cap is correctly positioned and fully seated on the burner head.
  • Clean air inlets: Inspect and clean the air intake openings at the base of the burner. Remove dust, grease, or debris.
  • Check gas conversion: Verify that the cooktop has been converted correctly for your gas type (natural gas or LPG) using the appropriate DeLonghi injector kit. Incorrect jets can cause poor flame quality.
  • Professional adjustment: If flames remain yellow or noisy, a qualified gas technician should check and adjust gas pressure and air shutters, and confirm the correct regulator is installed.
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Repair Difficulty

Hard 4/5

Required Part

Cooktop Gas Injector (Jet) Set
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