Valve. Control. HVAC Heater. Water.
A Valve used to Control the flow of engine coolant to the Heater core. To 10/18/2021.

HVAC Heater Control Valve

Fits Expedition, F-150, Navigator

2018-21. 3.3 LITER, AUXILIARY. F-150; 3.3L.
Heater Control Valve - Repair or Replace
A heater control valve diverts hot water (coolant, or antifreeze) from the radiator into the heater core in your vehicle’s cabin, resulting in soothing warm air. If your heat has stopped working, your 1999 Ford E-150 Econoline Club Wagon may require a replacement heater control valve.