Lennox 79J21 Ignitor a different control is required

a different control is required

or if the housing shows signs of stress cracking

as it will not affect or mask black lights

Precision-threaded design allows for straightforward removal with a standard 1-5/8" hex socket

requirements allows for proper gas pressure regulation and prevents the equipment from operating outside its intended set point

Lennox 79J21 Ignitor a different control is requiredThe Lennox 79J21 Ignitor is a heavy duty, genuine OEM electrode designed specifically for high demand residential and commercial furnace applications. As a dual purpose Lennox spark ignitor and flame sensor, this component provides the high voltage arc necessary for rapid gas ignition while simultaneously monitoring the burner flame to ensure safe, continuous operation. This furnace ignitor replacement is built using a glazed L 5 steatite insulator