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You are watching: Where is the heater control valve located

Heater control Valve

The heater core supplies engine coolant to provide heat come the passenger compartment. A heater regulate valve controls the amount of coolant flowing through the heater core. The is not offered in every heater systems, as part manufacturers allow coolant to flow through the heater core any kind of time the engine is running. This type of device uses a mix door come mix cooled and heated air to attain the wanted temperature.The heater manage valve enables the circulation of coolant with the heater main point to it is in controlled and also switched on and off there is no affecting the procedure of the remainder of the cooling system. It may be situated on the inlet or the outlet port of the heater core and activated by a cable, digital control, or a vacuum signal. This valve might be generally open, enabling coolant to circulation until activated, or generally closed, enabling coolant to flow only when activated.A cable-operated heater regulate valve provides a Bowden cable to drive a flap situated inside the valve. As the occupant manually moves a bar in the regulate panel, the cable moves a flap in the valve.The vacuum valve does the very same thing through a pintle and also diaphragm, except this form of valve is generally open. This is in instance of malfunction; warm may quiet be listed to the inhabitants by the heater system. The engine gives vacuum through a move in the dash.Electronic controls have the right to be (PWM) pulse broad modulated or managed by a basic on/off solenoid. Pulse broad modulation offers an ext control than manual controls. The regulate valve may also be either opened up or closed by a signal indigenous the BCM.

Initial Inspection

If the heater control valve is stuck closed, the valve"s inlet and outlet will continue to be at various temperatures. If the heater core is clogged, the inlet and also outlet will certainly be different temperatures. A leaking heater core will certainly leak ~ above the floorboard and result in a sweet, humid odor (coolant) comes from the vents while in operation.

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