Hob Ignition Problems – What’s Going Wrong and How to Fix It

If your cooker hob refuses to spark, you’re probably frustrated and wondering if you need a pricey call‑out. The good news is many ignition issues are easy to spot and fix yourself. Below we break down the usual suspects, quick DIY checks, and the signs that a professional is needed.

Why Your Hob Won’t Ignite

Most gas hobs use either a click‑type spark igniter or a piezo‑ceramic button. If the flame never appears, the problem usually lies in one of three places: the ignition electrode, the gas supply, or the safety devices that stop the spark when something’s off.

First, check the electrode. Over time it can get coated with food grime or rust, which blocks the spark. A clean, shiny tip should produce a bright blue spark when you press the igniter.

Second, look at the gas flow. A partially closed valve or a kinked hose can starve the burner of fuel, meaning there’s nothing for the spark to light. Make sure the gas tap is fully open and the hose isn’t twisted.

Third, many hobs have a safety thermocouple or flame‑failure device. If the sensor thinks there’s no flame, it cuts the spark to prevent leaks. A faulty thermocouple will need replacement, but you can test it by briefly holding a lit match near the burner while you try to ignite – if the spark works, the sensor may be the culprit.

Quick Fixes You Can Try

1. Clean the electrode. Turn the hob off, let it cool, then use a soft brush or a dry cloth to wipe away any residue. For stubborn build‑up, a little vinegar on a cotton swab works well. After cleaning, test the igniter – you should see a clear spark.

2. Check the gas supply. Locate the gas shut‑off valve behind the hob and ensure it’s fully open. If you smell gas or hear a hissing sound, close the valve and call a professional immediately – a leak is a safety hazard.

3. Inspect the wiring. Loose or corroded wires to the igniter can interrupt the spark. Tighten any loose connections and look for signs of wear. If wires are damaged, replace them or let an electrician handle it.

4. Test the safety sensor. Light a match, hold it close to the burner, and press the igniter. If the spark appears and the flame stays on, the sensor likely needs replacement. Most kits include a new thermocouple and basic instructions.

5. Reset the system. Some modern hobs have a reset button near the control panel. Turn the hob off, wait 30 seconds, press reset, and try again.

If none of these steps work, it’s time to call a qualified appliance repair service. Trying to fix a gas leak or a deep electrical fault without the right tools can be dangerous.

In most cases, a quick clean and a check of the gas valve will get your hob back to work. Keep a small brush and a bottle of white vinegar in your kitchen drawer for regular maintenance – a little care now saves a costly repair later.

Remember, safety comes first. If you ever smell gas, hear a hissing sound, or feel unsure about any step, stop and call a professional. With the right basics, most hob ignition problems are simple, quick, and affordable to solve.