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

Safety: Turn off the burner and allow it to cool before handling parts.

• Check cap alignment: Ensure the burner cap sits flat and centered on the burner head.
• Clean air inlets: Inspect the area under the burner head where air enters. Remove grease and debris that may restrict airflow.
• Verify gas type: Confirm that the appliance is configured for your gas type (natural gas vs. LPG). Hotpoint-Ariston models often require different injectors and regulator settings.
• Professional adjustment: If flames remain yellow or noisy after cleaning and correct assembly, have a qualified gas technician check injector sizes and regulator pressure.