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Home >> Lincoln >> 2003 >> Navigator 4WD >> Repair and Diagnosis (Single Page) >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> HVAC System - Control Components >> Description And Operation >> Control Components >> Control System Outputs-EATC >> Coolant Control Valve

Coolant Control Valve

The coolant control valve is actuated by the coolant control valve vacuum circuit. When the coolant control valve is closed (at full vacuum), coolant flow through the heater core is shut off and A/C cooling efficiency is increased.