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<h2>How does a heater control valve work&nbsp;in car?</h2>&nbsp;A heater control valve is a component in a vehicle's heating and cooling system that plays a crucial role in regulating the flow of hot coolant to the heater core.It acts as a temperature regulator, allowing the driver or passengers to adjust the temperature inside the vehicle.&nbsp;When the heater control valve is closed, it restricts the flow of coolant, preventing hot coolant from circulating through the heater core. This occurs when the heater is turned off or when the temperature control is set to a cooler setting. By limiting the flow of hot coolant, the valve ensures that heated air is not being directed into the cabin, maintaining a comfortable temperature.&nbsp;However, when the temperature control is adjusted to a warmer setting, a signal is sent to the heater control valve, prompting it to open. Opening the valve allows hot coolant from the engine's cooling system to flow into the heater core. As the hot coolant passes through the heater core, it transfers heat to the air that is forced over it. The blower fan then pushes this warmed air into the vehicle's interior through the vents, providing heating to the occupants.&nbsp;<h2>Bad heater control valve symptoms</h2>&nbsp;When a heater control valve malfunctions, it can lead to several noticeable symptoms:<ol><li>Insufficient Heat: The heater control valve restricts or blocks hot coolant flow, resulting in a lack of warm air from the vents when the heater is on.</li><li>Inconsistent Heating: A faulty heater control valve can cause intermittent heat output, with periods of warm air followed by bursts of cold air.</li><li>Coolant Leaks: Over time, the heater control valve may develop leaks, leading to coolant dripping or pooling under the vehicle.</li><li>Inability to Adjust Temperature: Malfunctioning heater control valve prevents effective adjustment of the air temperature despite changing the controls.</li><li>Overheating Engine: A stuck-open heater control valve can divert hot coolant away from the radiator, potentially causing the engine to overheat.</li></ol>It's important to address these symptoms promptly to ensure proper functioning of the heating system and prevent potential engine issues.

Heater Control Valve

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Air Filter Box

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Air Flow Sensor

Air Intake Duct

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Air Intake Hose

Air Intake Manifold Actuator Control Solenoid

Air Intake Manifold Flap Adjuster

Air Intake Manifold Runner Control Sensor

Electric Vacuum Pump

Engine Air Duct Assembly

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Engine Air Filter

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Intake Manifold

Intake Manifold Flap Actuator

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Intercooler

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Oxygen Sensor

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Pressure Sensor

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Throttle Body

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Throttle Position Sensor

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Turbocharger

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Turbocharger Oil Line

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Vacuum Pump

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Air Filters & Intake Systems

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Camshaft Adjuster

Camshaft Adjuster Cover

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Camshaft Timing Gear

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Camshafts

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Engine Valve Cover

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Harmonic Balancer

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Timing Belt Kit

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Timing Chain Kit

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Timing Cover

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Timing-Control Valve Solenoid

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Valve Lifters Tappet

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Cams, Timing & Valvetrain

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Belt Tensioner

Coolant Level Sensor

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Crankcase Breather Hose

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Crankcase Breather Valve

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Crankshaft Position Sensor

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Engine Oil Dipstick Tube

Engine Oil Filter

Engine Oil Pan Gasket

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Flywheel

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Oil Cooler

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Oil Cooler Line

Oil Filler Cap

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Oil Filter

Oil Filter Base

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Oil Filter Housing

Oil Filter Housing Cover

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Oil Level Sensor

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Oil Pan

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Oil Pump

Oil Pump Drive Gear Shaft

Oil Pump Pickup Tube

Cranks, Pistons, Oil & Components

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Camshaft Position Sensor

Camshaft Position Sensor & Magnet Kit

Connector Plug

Distributor Cap

Engine Valve Covers & Ignition Coils Kits

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Glow Plug Relay Module

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Ignition Coil

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Ignition Coils & Spark Plugs Kits

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Ignition Distributor

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Ignition Starter Switch

Ignition Switch Actuator

Knock Detonation Sensor

Relay

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Spark Plug

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Spark Plug Wire

Electronic Control Modules, Ignition & Distributors

Engine Wiring Harness

Intake Manifold Repair Kit

Engine Components & Accessories

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Auxiliary Water Pump

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Expansion Tank

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Expansion Tank Mounting Plate

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Fuel Cooler

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Radiator

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Radiator Hose

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Radiator Support Assembly

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Temperature Sensor

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Turbo Hose

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Water Coolant Pipe

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Water Outlet

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Engine Cooling

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Engine Mount

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Engine Mounts

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Catalytic Converter

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EGR Valve

Emissions Fluid Pump

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Exhaust Fluid Heater

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Exhaust Gas Temperature Sensor

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Exhaust Manifold

Fuel Tank Breather Valve

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Fuel Vapor Leak Detection Pump

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Nitrogen Oxide Sensor

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Secondary Air Injection Check Valve

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Vapor Canister Vent Solenoid

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Exhaust & Emission Systems

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Fuel Filter

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Fuel Injection Control Module

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Fuel Injection Pressure Regulator

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Fuel Injector

Fuel Injector Kit

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Fuel Injector Module Wiring Harness

Fuel Line Kit

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Fuel Pump

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Fuel Sending Unit

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Fuel Tank Filler Neck Pipe

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Fuel Tank Strap

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High Pressure Fuel Pump

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Idle Air Control Valve

Mechanical Fuel Pump

Oil Pressure Relief Valve

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Fuel Systems & Components

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The engine comprises many essential elements such as the lower cylinder block, upper cylinder head(s), and the cooling & lubricating systems. With A-Premium aftermarket engine components, you can expect that your engine deliver years of reliable performance. We offer a diverse selection of engine components from air filters and ignition coils (kits) to fuel pumps to cater to your needs.

Ford Fiesta Heater Control Valve