Where is the flame sensor located?

The flame sensor is typically located near the burner assembly in gas-fired appliances, such as furnaces, water heaters, or boilers. Its position allows it to effectively detect the presence of a flame during operation. In most setups, it is mounted in a way that it can directly "see" the flame, ensuring proper safety and functioning of the heating system. Always refer to the specific appliance's manual for the exact location, as it can vary by model.