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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 Cleaner

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Air Filter Box

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Air Flow Sensor

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Air Intake Duct

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Air Intake Hose

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Air Intake Manifold Actuator Control Solenoid

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Air Intake Manifold Flap Adjuster

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Air Intake Manifold Runner Control Sensor

Air Intake Resonator

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Electric Vacuum Pump

Engine Air Duct Assembly

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Engine Air Filter

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Intake Manifold

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Intake Manifold Flap Actuator

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Intake Manifold Repair Bracket

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Intake Manifold Runner Control Valve

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Intercooler

Intercooler Hose

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Oxygen Sensor

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Pressure Sensor

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Supercharger Pulley Drive Unit

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Supercharger Snout Rebuild Kit

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Throttle Body

Throttle Cable

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Throttle Position Sensor

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Turbocharger

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Turbocharger Gasket Kit

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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

Camshaft Kit

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Camshaft Timing Gear

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Camshafts

Chain Tensioner Adjuster

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Cylinder Head

Cylinder Head Assembly

Eccentric Shaft Actuator

Engine Timing Belt

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Engine Valve Cover

Engine Valve Cover Gasket

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Harmonic Balancer

Rocker Arm

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Rocker Arm Shaft Lifter Assembly

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Timing Belt Kit

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Timing Chain Gear

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Timing Chain Kit

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Timing Cover

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Timing-Control Valve Solenoid

Valve Cover Gasket

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Valve Lifter Guides

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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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Crank Installer Tool

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Crankcase Breather Hose

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Crankcase Breather Valve

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Crankshaft Position Sensor

Crankshaft Pulley

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Engine Oil Dipstick

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Engine Oil Dipstick Tube

Engine Oil Filter

Engine Oil Pan Gasket

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Flywheel

Harmonic Balancer Crankshaft Hub

Knock Sensor

Oil Baffle

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Oil Cooler

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Oil Cooler Line

Oil Drip Pan

Oil Filler Cap

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Oil Filter

Oil Filter Base

Oil Filter Cover

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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

Oil Separator

Serpentine Belt

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Cranks, Pistons, Oil & Components

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Camshaft Position Sensor

Camshaft Position Sensor & Magnet Kit

Connector Plug

Distributor Cap

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Electronic Ignition System

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Glow Plug

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Glow Plug Relay Module

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Ignition Coil

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Ignition Distributor

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Ignition Starter Switch

Ignition Switch Actuator

Kill Switch

Knock Detonation Sensor

Relay

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Spark Plug

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Spark Plug Wire

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Engine Wiring Harness

Intake Manifold Repair Kit

Pulley

Engine Components & Accessories

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Active Grille Shutter Actuator

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Auxiliary Water Pump

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Engine Coolant Air Bleeder Valve

Engine Coolant Pipe

Engine Coolant Shut Off Valve

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Expansion Tank

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Expansion Tank Mounting Plate

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Fan Pulley Bracket

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Fuel Cooler

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Overflow Hose Connector

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Engine Cooling

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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.

BMW M3 Heater Control Valve