Ariston Cooker CN11SG1/EX Main Stove Burner Fails to Remain Lit

I will try and help with this problem about Ariston Cooker CN11SG1/EX,

Hi, thanks for your email inquiry. Since you're not in the UK, you'll need to use the link in the sidebar if you need parts.

For the problem of the hob not staying lit, it’s usually not due to the spark or ignition system. If the flame lights and stays lit while you hold the control knob down, then the regulator and ignition system are working fine. The issue is likely with the flame safety device.

This thermal couple attaches to the hob burner and goes back to the control knob. If it’s not registering heat at the probe or if the electrical current isn’t reaching the control knob, it thinks there's no heat and turns off the gas for safety reasons.

I've made a detailed video explaining this, which I will add below. Please watch it and clean all the contacts. If it still doesn’t work, you’ll need to replace the thermal couple. I hope this helps, and I'll include some other videos on gas appliances below.

A thermocouple is a safety device used in gas appliances. It senses heat and helps control the flow of gas. When the burner is lit, the thermocouple gets hot and sends a small electrical current to the gas valve, keeping it open. If the flame goes out, the thermocouple cools down and stops sending current, causing the valve to close and cutting off the gas supply. This prevents gas from leaking into your home. If your hob isn't staying lit, it might be because the thermocouple isn’t working properly.

A thermocouple in a gas hob is a key safety device that works with the principle of generating a small electrical current in response to heat. Here's a simplified explanation:

1. Placement: The thermocouple is positioned near the burner flame, it must have a direct flame heating it. If there is no flame coming out on the burner in the direction of the thermal couple, this can also be an issue.

2. Heat Transfer: When you turn on the hob and ignite the burner, the flame heats up the tip of the thermocouple.

3. Electricity Generation: Due to the temperature difference between the hot tip and the cooler base of the thermocouple, a small electrical current is produced.

4. Gas Valve Control: This electrical current from the thermocouple acts like a signal to a gas valve. As long as there's a flame heating the tip, the current keeps the valve open, allowing gas to flow.

5. Safety Feature: If the flame goes out for any reason, the thermocouple cools down rapidly. This stops the electrical current, which in turn triggers the gas valve to shut. This prevents unburnt gas from leaking, ensuring safety.

In essence, the thermocouple acts like a flame sensor, keeping the gas supply running only when there's a lit flame.

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Ariston Cooker CN11SG1/EX

full list of spare parts for Ariston Cooker CN11SG1/EX model below