V-ZUG Incorrect Air-Gas Mixture / Burner Adjustment Fault

Gas burner ignites but flame is yellow, noisy, or lifting 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

Wrong injector (jet) size for gas type, Blocked primary air intake, Burner cap misaligned, Incorrect gas pressure from regulator

How to Fix / Troubleshooting

Safety first: Turn off the burner if the flame appears unstable or sooty. Ensure good ventilation.

User checks:

  • Remove and refit the burner cap and head, ensuring they sit correctly and evenly.
  • Clean burner ports with a soft brush; do not enlarge holes.

Technical checks (gas technician):

  • Verify that the cooktop is configured for the correct gas type (natural gas vs LPG) and that the appropriate injectors are installed.
  • Inspect and clean the primary air inlets under the burner.
  • Measure gas pressure and adjust or replace the gas pressure regulator if out of specification.
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Repair Difficulty

Medium 3/5

Required Part

Burner Injector Set
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