Gas burner goes out when knob is released (must hold knob in to keep flame)

Safety first: Turn off gas supply before working on thermocouples or valves.

Steps:

• Align thermocouple: Ensure the thermocouple tip is directly in the flame when the burner is lit. Gently bend it closer if needed.
• Clean tip: Lightly clean the thermocouple tip with fine abrasive pad to remove oxidation.
• Check connection: Under the cooktop, tighten the thermocouple nut at the gas valve.
• Replace thermocouple: If the flame still goes out when you release the knob, replace the thermocouple.
• Valve replacement: If a new thermocouple does not solve the issue, the safety valve may be defective and should be replaced by a professional.

Warning: Always leak-test gas connections after reassembly.