Why Your Furnace Keeps Shutting Off: How to Clean a Dirty Flame Sensor for Reliable Ignition
When your furnace keeps shutting off shortly after starting, it’s not just inconvenient—it’s a warning sign. One of the most common causes is a dirty or failing flame sensors , a small but vital safety component that detects whether the burners are producing a steady flame. Without it functioning properly, your furnace may misread conditions and shut down, leaving your home cold and uncomfortable. Fortunately, cleaning or replacing a flame sensor is a simple solution. In this guide, we’ll explain the signs of trouble, how to clean your sensor safely, and maintenance tips for reliable ignition. Common Signs of a Dirty or Failing Flame Sensor in Your Furnace and Their Fixes A dirty or failing flame sensor can cause your furnace to shut off, short-cycle, or fail to ignite. Recognizing early signs helps prevent costly repairs and restore reliable heating. Furnace Shuts Off Shortly After Ignition One of the clearest signs of a failing flame sensor is when the furnace ignites but shuts...