If your AEG gas hob's ignition system has stopped sparking, you're not alone. Ignition failure is one of the most common issues reported by AEG hob owners in Spain. The good news is that many causes can be diagnosed and fixed without calling a technician. This guide walks you through the typical reasons—from dirty burner caps to faulty switches—and provides clear, step-by-step solutions. Always prioritize safety: disconnect the hob from the gas and electricity supply before attempting any repair. For a broader overview of common issues, see The Complete Guide to AEG Appliance Repair in Spain.

How the AEG Hob Ignition System Works

Modern AEG gas hobs use a mains-powered electronic ignition system. When you press a knob, a microswitch sends current to a spark module, which generates high-voltage pulses to one or more spark electrodes. The spark ignites the gas released from the burner. Some models have a single spark generator for all burners; others have individual modules. Understanding this basic sequence helps pinpoint where the failure occurs.

Common Causes of Ignition Failure

Before diving into repairs, consider these frequent culprits:

  • Dirty or wet burner caps and rings – Food residue or moisture can prevent a spark.
  • Faulty spark plug (electrode) – Cracked or carbon‑covered electrodes won't spark.
  • Defective microswitch – The switch under the knob may not activate the spark module.
  • Broken spark module – The high‑voltage generator fails.
  • Loose or damaged wiring – Connections to the module or electrode can corrode. Learn more about Loose or Damaged Wiring.
  • Blown fuse or tripped circuit breaker – The hob's electrical supply is interrupted.

Tools and Safety Precautions

For most fixes you'll need:

  • Flat‑head and Phillips screwdrivers
  • Multimeter (for continuity testing)
  • Soft brush and cloth
  • Isopropyl alcohol or hob cleaner
  • Replacement parts (if needed) – available at Recambios Cocina or Amazon Spain. Prices for a spark module range from €15 to €40; microswitches cost around €5–€12.

Safety first: Unplug the hob or switch off the circuit breaker. Turn off the gas supply at the valve. Never test sparking with the gas on – use a butane lighter to check gas flow after repairs. For essential precautions, review DIY AEG Repair Safety Tips.

Step‑by‑Step Troubleshooting

1. Clean the Burner Assembly

Remove all burner caps, rings, and heads. Wash them in warm soapy water, rinse, and dry thoroughly. Use a soft brush to clean the electrode tip and the ceramic insulator. Moisture is a common cause – if the hob was cleaned recently, wait 24 hours for hidden moisture to evaporate. Reassemble and test.

2. Check the Spark Electrode

Inspect the electrode for cracks, chips, or heavy carbon buildup. A damaged electrode cannot produce a spark. The gap between electrode and burner should be 3–4 mm. Adjust by gently bending the electrode (with the hob unplugged). If cracked, replace the electrode – typically €8–€15. Unscrew the fixing screw, pull out the old electrode, and insert the new one.

3. Test the Microswitch

Remove the knob by pulling it straight off. Some knobs have a small grub screw – loosen it first. Under the knob, you'll see the switch. Use a multimeter to check continuity when the switch is pressed. If no continuity, replace the switch (€5–€12). Desolder or cut the old wires and connect the new switch. Ensure the knob's cam actuates the switch correctly.

4. Inspect the Spark Module

The spark module is usually located under the hob or behind the control panel. Access it by removing the hob top (see your manual). Look for burn marks or melted plastic. Test the module by disconnecting the output wire to the electrode and using a neon tester or multimeter set to AC voltage (some modules output DC). When you press a knob, you should see a strong spark or measure 10–15 kV. If no output, replace the module (€15–€40). For guidance on checking internal components, refer to How to Check the Control Board on AEG Appliances.

5. Verify Wiring and Connections

Check all wires from the module to the electrode and microswitches for breaks, corrosion, or loose terminals. Reconnect or replace damaged wires. Use heat‑shrink tubing for repairs.

6. Check the Electrical Supply

Ensure the hob is plugged in and the circuit breaker hasn't tripped. Some AEG hobs have a fuse on the control board – locate and test it with a multimeter. Replace if blown (€2–€5).

7. Test the Gas Supply

If you hear sparking but no flame, the gas supply may be blocked. Turn off the hob, wait 5 minutes, then try a different burner. If no burner lights, check the main gas valve. In Spain, gas bottles (butano/propano) may be empty – replace the bottle. For natural gas, contact your supplier.

When to Call a Professional

If you've completed the steps above and the hob still won't ignite, the issue may lie in the main control board or the gas regulator. These repairs require specialized knowledge and tools. In Spain, you can find certified AEG repair technicians through the official AEG service network or local workshops. Expect a call‑out fee of €50–€80 plus parts. Attempting advanced repairs without experience can void your warranty or create a gas leak hazard. Learn more about When to Call a Technician for AEG Appliances.

Preventive Maintenance Tips

  • Clean burner caps and rings after every use – avoid letting spills dry.
  • Wipe the hob top with a damp cloth and dry it – never pour water over the burners.
  • Check the electrode gap annually.
  • Replace worn knobs if they become hard to turn – they can damage microswitches.
  • Use a hob cover when not in use to protect from dust and grease.

Regular maintenance can extend the life of your AEG hob and minimize ignition issues. For other common problems, see our guides on AEG oven not heating and AEG oven error codes.

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