Lennox 18G89 Flame Sensor

The Lennox 18G89 Flame Sensor is anessential safety device for HVAC systems, which is to sense the existence of flame in the furnace for normal and safe operation. This flame sensor works in a way that it checks the flame of the burner during the period of ignition. If the sensor does not pick the flame, it triggers the system to switch off the supply of gas to avoid unburned fuel buildup and the associated fire risks. These compact dimensions allow easy installation and compatibility with most of the Lennox heating equipment such as furnaces and boilers.