Texas Furnace(Consolidated Ind) 7103201 Flame Sensor

The Texas Furnace(Consolidated Ind) 7103201 Flame Sensor detects ionization current produced by an active burner flame within a gas furnace, confirming combustion before the control board allows continued gas valve operation. A sensing rod positioned in the flame path collects microamp-level current from burning gas, transmitting a verified signal that keeps the valve energized. The sensor fastens to the burner bracket through a single mounting tab, locating the rod tip precisely within the flame envelope. Gas valve control in HVAC systems uses this sensor to confirm active combustion each heating cycle, shutting off fuel flow immediately when the current drops.