Which component is responsible for igniting the gas in a furnace?

The component responsible for igniting the gas in a furnace is the igniter. This device plays a critical role in the operation of a gas furnace by producing a flame or a spark that ignites the gas when it is released from the gas valve. When the furnace signals that it is time to heat, the gas valve opens and allows gas to flow. The igniter then generates the initial heat or spark needed to ignite the gas, starting the combustion process that heats the air distributed throughout the home.

Understanding the role of the igniter is essential for maintenance and troubleshooting issues related to ignition failures in gas furnaces. Proper functioning of the igniter is crucial, as a faulty igniter can lead to the furnace not operating at all or producing an incomplete combustion, which can result in safety hazards and decreased efficiency.