The procedure of initiating a small, continuous flame within a furnace is essential for igniting the main burner and providing heat. This flame serves as a constant ignition source, ready to activate the primary heating component when the thermostat calls for warmth. Failure of this small flame necessitates manual intervention to restore heat production.
Maintaining a functional pilot light ensures consistent heating system operation, particularly crucial during cold weather. Historically, these small flames were a standard feature in gas-powered appliances, offering a reliable method of ignition. While some newer furnaces utilize electronic ignition systems, many older models still rely on this more traditional approach.