What part is responsible if the main burner stays on when the pilot goes out?

The safety valve is crucial in ensuring the safe operation of gas appliances. Its primary function is to control the flow of gas to the main burner and to shut it off in the event of a malfunction, such as when the pilot light goes out. The safety valve typically includes a feature that senses the presence of heat from the pilot flame. If the pilot light goes out, the safety valve is designed to close, which prevents gas from flowing to the main burner. If the main burner remains lit despite the pilot being out, it indicates that the safety valve is not functioning correctly, as it should have closed, stopping the gas supply.

Understanding how the safety valve operates helps in diagnosing issues in gas appliances, as it plays a critical role in preventing gas leaks and potential hazards.