Dual Coolant Control Valve

The dual coolant control valve regulates the flow of engine coolant to each half of the heater core. Two electric solenoids, which are individually actuated by the dual-zone EATC module, are the control elements. Based on inputs from the dual-zone EATC module, the solenoids cycle open and closed to regulate the coolant flow to the heater core. The solenoids can be cycled at different speeds by the dual-zone EATC module in order to maintain different temperatures for each half of the heater core. Under certain conditions when heating is not required, the dual coolant flow valve will bypass the heater core by closing both solenoids.