What component is a solenoid that controls the venting of gas from the boiler?

The correct answer is the gas vent solenoid, as it is specifically designed to control the venting of gas from the boiler. A solenoid is an electromechanical device that can open or close a valve when an electric current passes through it. In the context of a gas boiler, the gas vent solenoid operates to manage the release of gas safely, ensuring that the venting system functions properly to prevent any buildup of gas within the boiler environment.

Proper venting is crucial for maintaining the boiler’s efficiency and safety because it helps in the safe extraction of combustion gases, preventing hazardous situations. The gas vent solenoid is typically activated as part of the boiler's operational controls, usually in response to certain conditions, such as the need to vent waste gases or to ensure that the boiler operates within safe parameters.

The other components listed serve different purposes. The main gas shutoff valve is responsible for stopping the flow of gas entirely, while the pressure relief valve is designed to release excess pressure from the system to prevent overpressure conditions. The flame scanner, on the other hand, plays a role in monitoring the flame's presence to ensure that combustion is occurring safely, but it does not directly control gas venting. Thus, the unique function of the gas