How Do You Clean A Flame Sensor On A Gas Furnace?
To clean a flame sensor on a gas furnace, turn off the furnace and allow it to cool completely. Locate the flame sensor, typically located near the burners. Remove the sensor by unscrewing it and gently cleaning it with a soft cloth or fine-grit sandpaper. Reinstall the sensor and ensure that it is properly positioned. Turn the furnace back on and observe whether the flame sensor is working properly.