What is the function of a hot surface igniter in a gas ignition system?

The function of a hot surface igniter in a gas ignition system is to produce heat for ignition. This component is crucial in the ignition process of gas appliances, such as ovens and furnaces, where it generates a high enough temperature to ignite the gas. When electric current passes through the hot surface igniter, it reaches a red-hot state, allowing it to ignite the gas as it flows into the combustion area.

For a better understanding, remember that while other components in a gas ignition system play vital roles—such as regulating gas flow and controlling combustion—the hot surface igniter’s primary purpose is specifically related to creating the necessary heat for the ignition process. Additionally, flame detection, typically conducted by flame sensors, is a separate function that ensures safety by confirming that a flame is present after ignition.