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How to Clean the Furnace Ignitor

August 26, 2024

Your furnace ignitor plays a crucial role in keeping your home warm and comfortable during the colder months. Regular maintenance, including cleaning the furnace ignitor, is essential to ensure optimal performance and efficiency. In this post, Midwest Duct Cleaning will explore the importance of cleaning the furnace ignitor, signs that indicate it needs attention, and steps to clean it properly.

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Understanding the Furnace Ignitor

The furnace ignitor is responsible for igniting the gas in your furnace, which generates heat to warm your home. There are two main types of furnace ignitors: hot surface ignitors and spark ignitors. Hot surface ignitors use an electric current to heat up and ignite the gas, while spark ignitors create a spark to ignite the gas.

Signs Your Furnace Ignitor Needs Cleaning

Knowing when your furnace ignitor needs cleaning is crucial for maintaining optimal furnace performance. Look out for signs such as frequent cycling, a weak flame, or a burning smell when the furnace operates. These symptoms often indicate that the ignitor is dirty or malfunctioning and needs attention.

Steps to Clean the Furnace Ignitor

Cleaning the furnace ignitor is a relatively simple task that can be done as part of routine furnace maintenance. Here's a step-by-step guide:


  1. Turn off power to the furnace and allow it to cool completely.
  2. Locate the furnace ignitor, which is typically located near the burner assembly.
  3. For hot surface ignitors, gently clean the ignitor with a soft brush or cloth to remove any dirt and debris buildup. Be careful not to apply too much pressure, as these ignitors are fragile.
  4. For spark ignitors, carefully clean the ignitor electrode and the surrounding area to ensure proper spark ignition. Use a soft brush or cloth to remove any dirt or debris.
  5. Once the ignitor is clean, carefully reassemble any components that were removed and restore power to the furnace.

Tips for Preventing Future Buildup

To prevent future buildup and ensure continued furnace performance, consider the following tips:

  • Schedule regular furnace maintenance, including inspection and cleaning of the ignitor, as part of your annual HVAC service.
  • Keep the area around the furnace clean and free of dust and debris to prevent contamination of the ignitor.
  • If you notice any signs of a dirty or malfunctioning ignitor, address them promptly to prevent further damage to the furnace.

Keep Your Furnace Running Smoothly – Schedule Maintenance Today!

Cleaning the furnace ignitor is an essential aspect of furnace maintenance that can help prevent ignition problems and extend the lifespan of your furnace. By following the steps outlined in this post and staying vigilant for signs of a dirty or malfunctioning ignitor, you can ensure that your furnace continues to operate efficiently and effectively.


Is your furnace due for maintenance? Contact Midwest Duct Cleaning today to schedule professional furnace maintenance services in the Kansas City Metro area. Our experienced technicians can ensure that your furnace ignitor is clean and functioning properly, keeping your home warm and comfortable all winter long.

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