A pilot light is a small flame that ignites the main burner in a gas appliance, such as a furnace, water heater, or stove. It is important to check the pilot light regularly to ensure that it is lit and burning properly. A lit pilot light indicates that the gas is flowing properly and that the appliance is ready to use. If the pilot light is out, the appliance will not be able to ignite and produce heat.
There are several reasons why a pilot light may go out. One common reason is a draft, which can blow out the flame. Another reason is a dirty or clogged orifice, which can prevent gas from flowing to the pilot light. If the pilot light has been out for an extended period of time, the gas line may need to be purged of air before the pilot light can be relit.