What is the purpose of a pilot light in gas appliances?

The pilot light's primary function is to ignite the main burner when the appliance is ready for operation. In gas appliances, the pilot light provides a small flame that remains lit and acts as an ignition source for the main gas flow. When the appliance is activated, the gas is released to the burner, and the presence of the pilot light allows this gas to ignite instantly, ensuring the appliance can function properly and safely.

While indicating that an appliance is working, regulating gas pressure, or improving heating efficiency are important aspects of appliance operation, they do not represent the pilot light's fundamental role. The pilot light is crucial because it ensures a reliable and immediate ignition source, which is essential for the safe and effective operation of gas appliances.