In the cooling system, which component directs coolant flow between paths?

In the cooling system, which component directs coolant flow between paths?

• A. Check Valve
• B. 3-Way Valve
• C. Drain Valve
• D. Temperature Sensor

Answer: (B)

When coolant needs to be sent along different routes, the component that functions as a switch between paths is a valve with three ports that can connect the source to one of two outputs. This three-way valve directs hot coolant either through the heater core or along another path (such as bypassing the heater or going toward the radiator) based on engine demand and control signals. That switching capability is what makes it the correct choice for directing coolant flow between paths. A check valve merely prevents backflow in a single line and doesn’t switch between multiple routes. A drain valve is used to release coolant for maintenance and does not route flow. A temperature sensor monitors coolant temperature and informs control logic but does not alter the flow path.

When coolant needs to be sent along different routes, the component that functions as a switch between paths is a valve with three ports that can connect the source to one of two outputs. This three-way valve directs hot coolant either through the heater core or along another path (such as bypassing the heater or going toward the radiator) based on engine demand and control signals. That switching capability is what makes it the correct choice for directing coolant flow between paths.

A check valve merely prevents backflow in a single line and doesn’t switch between multiple routes. A drain valve is used to release coolant for maintenance and does not route flow. A temperature sensor monitors coolant temperature and informs control logic but does not alter the flow path.