How Can You Tell If Your Trane XR90 Flame Sensor Is Causing Safety Shutdowns: Top 9 Signs to Watch For
The flame sensor in your Trane XR90 is a small but crucial component that ensures your furnace ignites safely. Its primary role is to detect the presence of a flame when the burners are on. If the flame sensor becomes dirty, worn, or faulty, it can trigger repeated safety shutdowns, leaving your home cold and your heating system inefficient. Recognizing the early signs of Trane XR90 flame sensor issues can save you from costly repairs and prolonged discomfort during cold weather. In this guide, we’ll break down the top 9 signs your Trane XR90 flame sensor may be malfunctioning, why it happens, how to diagnose it, and what to do next. What Is a Trane XR90 Flame Sensor and Why It Matters A flame sensor is a thin metal rod that sits in the path of the burner flame. Its job is to detect the presence of a flame and send a signal to the furnace control board, telling the system that it is safe to keep the gas valve open. When the flame sensor works properly, your furnace operates smoo...