Armstrong Furnace R46895-001 Flame Sensor

The Armstrong Furnace R46895-001 Flame Sensor is a crucial safety component in Armstrong Air gas furnaces. It acts as a watchful eye, continuously detecting the presence of a flame during operation. This ensures the furnace only burns fuel when a proper flame is established, preventing gas leaks and potential hazards. The sensor functions by sending a small electrical current (typically 115VAC at 60Hz in the US) through a rod into the flame. The flame disrupts this current, and the furnace control board interprets this disruption as a sign of a healthy flame. This lightweight (around 0.03lb) component plays a vital role in safe and efficient furnace operation.