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<h2>What does an AC compressor do in a car?</h2>Although the air conditioning (A/C) system in your car is made up of a variety of components, the compressor is one of the critical components that develop the system's essential cycle. Without it, your complete A/C system won't be able to produce cool air inside the car, which is its primary job. The <a href="/blogs/understanding-different-types-of-car-ac-compressors-and-how-they-work">AC compressor's function</a> is to compress the refrigerant in the automobile to the correct pressure to activate its heat-transfer properties and adjust temperatures. Doing this lets you keep cool in the summer and have a clear windshield in the winter.<h2>How does an A/C compressor work?</h2>The AC compressor is responsible for circulating that refrigerant gas all throughout the different components to make the cooling happen.&nbsp;It takes in that refrigerant gas after it's come through the evaporator. This refrigerant is in a low-pressure, low-temperature state at this point. But then the compressor squeezes and compresses the heck out of it, which jacks up the pressure and temperature of the gas dramatically.Now that hot, high-pressure refrigerant gas gets pushed out of the compressor and over to the condenser. In the condenser, all that heat gets released and the gas condenses back into a high-pressure liquid form. From there, the liquid refrigerant goes through an expansion valve, which drops the pressure and temperature even further before it reaches the evaporator.Inside the evaporator, that cold, low-pressure refrigerant absorbs heat from the cabin air, causing it to evaporate back into a gas. And that's the cooled air that gets blown into the car's interior. Then the low-pressure gas cycles back to the compressor to start the whole process over again.<h2>Car AC compressor failure symptoms</h2><a href="/blogs/how-to-fix-a-noisy-car-ac-compressor">Car AC compressor failures</a> are crucial for vehicle owners to be aware of. AC compressor failure can lead to discomfort, especially during hot weather, and addressing the issue promptly can prevent further damage and costly repairs. Recognizing the following signs allows you to take preventive action before the situation worsens:<ul><li>Warm air: The air blowing from your AC vents is warm rather than cool, indicating a lack of proper cooling refrigerant circulation.</li><li>Strange noises: Unusual noises, such as grinding, squealing, or rattling, when the AC is turned on can indicate compressor issues.</li><li>Vibration: Excessive vibration or shaking felt when the AC is engaged may suggest a problem with the compressor.</li><li>AC clutch not engaging: If the AC clutch, the component responsible for engaging and disengaging the compressor, doesn't activate, cooling won't occur.</li><li>Leaking refrigerant: A sudden loss of refrigerant or visible leaks around the compressor can point to compressor failure.</li><li>Belt issues: Damaged or loose belts connected to the compressor can result in cooling problems and unusual sounds.</li><li>Reduced cooling performance: If the AC provides weaker cooling performance than usual, the compressor may not be functioning optimally.</li><li>Electrical issues: Malfunctions in the electrical circuitry connected to the compressor can disrupt its operation.</li><li>Burnt smell: A burnt or unusual smell when the AC is on might indicate compressor overheating.</li><li>Excessive cycling: Rapid on-off cycling of the compressor can indicate problems with its internal components.</li><li>Dashboard warning lights: Some vehicles have warning lights that illuminate when there's an issue with the AC system, including the compressor.</li><li>Higher engine temperature: AC compressor issues can lead to additional load on the engine, resulting in higher operating temperatures.</li></ul>

AC Compressor

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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

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Oil Filter Housing

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Oil Level Sensor

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Oil Pan

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Oil Pump

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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.

2018 BMW 340i AC Compressor

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