What role does the flow switch play in an electric fired boiler?

The flow switch plays a vital role in an electric fired boiler by ensuring water flow through the appliance. When water is not flowing adequately, the flow switch detects this condition and can prevent the boiler from operating. This is crucial because operating a boiler without adequate water flow can lead to overheating and damage to the heating elements. By monitoring the flow of water, the switch helps maintain safe and efficient operation of the boiler, ensuring that the heating system is protected from conditions that could lead to failure or unsafe situations.

In this context, the other roles mentioned, like ensuring gas flow, regulating electrical supply, or measuring boiler pressure, are not functions of the flow switch in an electric fired boiler. Instead, those functions pertain to other components of the system such as gas valves for gas boilers, relays or contactors for electrical supply, and pressure gauges for monitoring pressure levels.