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<h2><span style="font-size: 18px;"><strong>C</strong><strong>ar </strong><strong>A/C</strong><strong>&nbsp;expansion valve</strong></span></h2><p>The expansion valve is a crucial component that plays a key role in regulating the flow of refrigerant through the car&rsquo;s AC system. It is positioned between the high-pressure and low-pressure sides of the AC system. The expansion valve acts as a valve or metering device that controls the flow of high-pressure, high-temperature liquid refrigerant from the condenser to the low-pressure side, where it can evaporate.</p><h2><span style="font-size: 18px;"><strong>How does an A/C expansion valve work?</strong></span></h2><p>As the high-pressure liquid refrigerant passes through the Expansion Valve, it undergoes a rapid pressure reduction. This causes the refrigerant to expand and transform into a low-pressure, low-temperature gas.&nbsp;The expansion of the refrigerant leads to a significant drop in temperature. This cold refrigerant gas is then circulated through the evaporator coil in the car's AC system. The cold refrigerant gas absorbs heat from the surrounding air as it passes over the evaporator coil. This process cools down the air, which is then blown into the vehicle's interior by the AC blower fan.</p><h2><span style="font-size: 18px;"><strong>Signs of a bad expansion valve</strong></span></h2><p>You should be aware of these common signs that may indicate a problem with the AC expansion valve:</p><ul><li>Insufficient Cooling: Reduced cooling from the AC system.</li><li>Inconsistent Temperature: Difficulty maintaining a consistent interior temperature.</li><li>Warm Air at Idle: Warmer air from vents when the car is idle.</li><li>Excessive Cooling: Overly cold air and potential freezing of the evaporator coil.</li><li>AC Cycling Rapidly: Frequent on/off cycling of the AC compressor.</li><li>Hissing or Whistling Noises: Unusual noises from the AC system.</li><li>AC System Pressure Abnormalities: Irregular pressure readings in the AC system.</li><li>Frost on the Evaporator Coil: Ice buildup on the evaporator coil.</li></ul>

A/C Expansion Valve

Air Cleaner

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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

Air Intake Resonator

Electric Vacuum Pump

Engine Air Duct Assembly

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Engine Air Filter

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Intake Manifold

Intake Manifold Flap Actuator

Intake Manifold Repair Bracket

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

Engine Valve Covers & Ignition Coils Kits

Glow Plug

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Glow Plug Relay Module

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Ignition Coil

Ignition Coils & Spark Plugs & Wires Kits

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Ignition Coils & Spark Plugs Kits

Ignition Coils & Wires Kits

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Ignition Distributor

Ignition Lock Cylinder

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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

Electronic Control Modules, Ignition & Distributors

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

Drive Motor Inverter Cooler

Electric Engine Water Pump

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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Radiator

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Radiator Control Fan Module

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Radiator Core Support Skid Bar Plate

Radiator Fan Cooling Motor

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Radiator Hose

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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.

Volvo XC90 A/C Expansion Valve