HVAC Parts

  When the temperature drops and your heating system becomes essential, the last thing any homeowner or facility manager wants is a malfunctioning furnace. One of the most common reasons for furnace failure—especially in gas furnaces—is a faulty ignitor. Whether you're running a residential HVAC system or managing commercial heating in a building, knowing when to schedule a furnace ignitor replacement can prevent downtime, discomfort, and costly repairs. In this in-depth guide, we’ll walk you through the key warning signs your furnace ignitor needs replacement, explain how the ignitor works, provide expert insights on how to diagnose and replace it, and show why timely action in 2025 can save you both money and headaches. What Is a Furnace Ignitor and Why Is It So Important? The furnace ignitor is a small but critical component in modern gas furnaces. It’s responsible for creating the spark or heat source that ignites the gas to generate warmth. Without a working ignitor, the enti...