What is the primary purpose of a pilot light?

The primary purpose of a pilot light is to light the main burners. A pilot light serves as a small, continuously burning flame that ensures the combustion system is ready to ignite when needed. When the appliance is called to operate (e.g., when a thermostat signals for heat), the pilot light provides the necessary ignition source for the main gas burners, allowing gas to ignite safely and efficiently. This mechanism is crucial for the overall operation of gas appliances, as it ensures that the gas is only ignited when required, providing a reliable and controlled heating process.

In contrast, other functions such as increasing pressure, monitoring temperature, or circulating air are not directly related to the function of a pilot light. Increasing pressure typically relates to different systems or components within gas installations and does not apply to the ignition process. Monitoring temperature is a function that could involve thermostats or temperature sensors, but this is separate from the pilot light's ignition role. Circulating air pertains to ventilation and airflow management, which is not the focus of a pilot light's primary function.