stove sparks but won't light

Is Your Thermador Range Not Lighting? Here are 4 Reasons Why

A Thermador range is a high-quality brand with superior function. So to find your range not lighting when you turn on a burner can be as frustrating as figuring out why. We’ll troubleshoot 4 causes for a Thermador range not lighting from dirty burners to a faulty igniter so you can solve the problem quickly.

Troubleshooting the Top 4 Reasons for a Thermador Range Not Lighting

A Thermador range not lighting isn’t always due to a malfunction. Sometimes the most common reasons can be remedied with a few DIY fixes.

#1. Clean Thermador Range Burners

The average range takes part in some messy cooking sessions and hasty post-dinner cleanups. But when old spills and food particles harden and crust over burner ports, they can block the flow of gas required to light the burner. If the stove sparks but won’t light it’s also possible food particles are clogging the igniter. This can block the electric current the igniter needs to spark and ignite the gas.

Cleaning your burners on a monthly basis helps prevent a buildup of food that can clog the igniter and burner ports. Here’s how to clean Thermador range burners quickly and effectively:

  1. Remove burner caps by lifting straight upward
  2. Dip a soft cloth in warm, soapy water and gently scrub burner caps
  3. Use a non-abrasive cleaner for stubborn stains
  4. Rinse burner caps under running water
  5. Allow to air dry completely
  6. While caps are drying, dampen a cotton swab with warm water and gently wipe the igniter and burner ports
  7. Use a toothpick to carefully scrape away caked-on particles
  8. Allow igniter and ports to air dry completely
  9. Replace burner caps
thermador range not lighting
Image Credit: Thermador

#2. Remove Excess Moisture

If your Thermador range burner will not ignite after a large cooking spill or after cleaning, it’s possible that lingering moisture is the problem. If liquid cleaner or water collects around the burner ports, it can inhibit the flow of gas. Similarly, a damp igniter won’t be able to respond to the electrical current it needs to light the gas.

You can remove excess moisture by gently swabbing the burner ports and igniter with a clean, dry cloth or paper towel. Allowing additional time for air-drying can also help moisture evaporate.

#3. Replace the Faulty Igniter

Sometimes range burners spark but won’t light if the igniter is faulty. Evidence of a defective igniter includes intermittent sparking or a weak spark that fails to light the burner.

The igniter is part of an ignition system that works together to light the burner. To determine if the igniter is defective, first rule out that the spark electrode and its wiring aren’t causing the problem. If these components are functioning properly, it’s likely that the igniter is faulty and needs to be replaced.

#4. Assess Defective Ignition Switch

A Thermador range not lighting can also be caused by a malfunctioning ignition switch. This component is what sends electricity to the igniter so it can spark and light the burner. If the switch isn’t functioning properly, the igniter won’t receive the electricity it needs to spark.

If the igniters on your other burners are sparking properly, it’s likely that the ignition switch is the problem and requires replacement.

If your Thermador range not lighting continues to be a problem, it may be time for a professional evaluation. D&T Appliance Service can help with any Thermador range repair in Minneapolis and beyond.

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