Why Does the Piezoelectric Ignition of My Gas Hob Run Continuously?

Jul 29, 2023, 17:38pm

There are several hobs such as the induction hob, the electric hob or the gas hob. Gas cooking is easy to use and, unlike an electric hob, the heat does not remain once the appliance is switched off.

Gas hobs are equipped with piezoelectric ignition: this is the system that allows you to press the button and create the spark. It is possible that this piezoelectric system is faulty and works continuously. In this case, it will be necessary to check:

  • switches
  • the transformer

Piezoelectric ignition systems are common in many gas hobs. They work by generating a spark that ignites the gas when you turn the knob. However, you may sometimes find that the ignition keeps running continuously even after the gas has been ignited. This issue can be disconcerting, not to mention irritating due to the constant clicking sound. In this article, we will explore the potential reasons behind a continuously running piezoelectric ignition and how you might resolve the issue.

Why Does the Piezoelectric Ignition of My Gas Hob Run Continuously?

Moisture in the Ignition System

One of the most common reasons why the ignition system on a gas hob keeps running continuously is moisture build-up. This can happen if you’ve recently boiled something over on the stove, cleaned the stove, or there is high humidity in your kitchen.

Solution: Try to dry out the ignition system. You can do this by turning on the burners for a few minutes to evaporate the moisture. If this doesn’t work, you can also try using a hairdryer set on a cool setting to blow air around the ignition system. If the issue persists, you may need to let the stove sit for a few hours to air dry before trying again.

Stuck Ignition Switch

If the ignition switch is stuck or jammed, it can cause the ignition to run continuously. This can occur due to a build-up of grease, food particles, or other debris.

Solution: Clean the control knobs and the area around them. You can usually do this with a damp cloth and mild detergent, but you should consult your owner’s manual for specific instructions. If the knobs are removable, take them off and clean underneath.

Faulty Ignition Switch

A faulty ignition switch could also be the reason behind the continuous sparking. If the switch is defective, it might keep sending a signal to the ignition system to keep sparking.

Solution: If you suspect that the ignition switch is defective, it’s usually best to call a professional. The switch might need to be replaced, and dealing with gas appliances can be hazardous if not handled correctly.

Why Does the Piezoelectric Ignition of My Gas Hob Run Continuously?

Worn Out Ignition Electrode

Over time, the ignition electrode can wear out or get damaged, causing the ignition to run continuously.

Solution: Check the ignition electrode for any visible signs of damage. If it appears to be worn out or damaged, it will likely need to be replaced. Because this involves interacting with the gas system, it’s best to hire a professional for this task.


The transformer is used to generate high voltage to power the spark plugs. Since it works with high voltage, it cannot be checked with a normal multimeter.

However, you can check its condition, it should not have any swelling or burns. If it is in bad condition, then change it.

When to Call a Professional

While some of these potential issues can be addressed by a knowledgeable homeowner, others require professional help. If you’re uncomfortable working with gas appliances, or you’ve tried the solutions above and the issue persists, it’s time to call a professional. They can properly diagnose and safely repair the issue.

In conclusion, a continuously running piezoelectric ignition can be caused by several issues, from simple moisture build-up to a faulty switch or electrode. By understanding these potential problems, you can take steps to resolve them and ensure the safe and efficient operation of your gas hob.