A/C Compressor-Buyer’s Guide

The A/C compressor controls refrigerant flow through the entire AC system. High-quality A/C compressors are very easy to set up. Drivers have been experiencing the benefits of excellent air comfort and ease inside their vehicles since the late 1930s, when the Packard Motor Car Company launched the former luxurious feature as an option in end-user vehicles. Today, we view not having A/C in the car as a tremendous burden and one that people want to correct immediately. In reality, you don’t realize how essential the A/C as part of your car is until it fails and you’re trapped in traffic on a sweltering afternoon. Most people have been in a car without having air conditioning when it’s scorching. Therefore we know you’d rather stay inside than need to drive in the oven, which is your loving car.

A/C Compressor
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This buyer’s guide undergoes the buying process of the way to get an AC compressor and allows you to make all the right choices.

What does an A/C Compressor do?

The very first thing you must know is what an air compressor does inside the vehicle. The goal of an A/C compressor should be to cool air moving through the car’s cabin. The A/C compressor is a vital element of your automobile’s A/C system, and if your A/C compressor is declining, you won’t get cool air. The air compressor begins the cooling course of action by pumping a combination of Freon and specialized oil within the system.

The A/C compressor operates by compressing refrigerant to be distributed through the entire air conditioning system. Whenever your car’s AC isn’t working correctly, it’s typically one of two issues – low refrigerant (generally due to a leak) or a poor compressor. If you’ve looked at the refrigerant level and it’s good enough, the issue is almost in the compressor. A/C compressors may go through external or internal failure. External failure occurs due to a deteriorating clutch, pulley, or refrigerant leak. It is the more accessible sort of problem to correct. Internal failure is often detected by the existence of metal bits or flakes throughout the compressor. This sort of problem can spread all through the cooling system. In case of internal failure, it’s generally cheaper to change the central compressor.

A/C Compressor
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Important Information

To begin with, purchasing a suitable A/C compressor, you must have some details on hand about your automobile. The prominent part of the information required is the same year, model and make, and maybe sub-model number. These details are vital since manufacturers change positions for different model years and often even within a similar model year. Because of this, you may want to have the vehicle’s manufacturing date (vehicle made the specific date in the manufacturing plant) available. Don’t worry; the manufacturing date is available in the car on the driver’s side door jam and is often coded in date/month/year or month/year format. Most A/C compressors don’t require someone to have a manufacturing date. However, if one is essential, check out your car and get the date.

AC Compressor

AC Compressor

Suppose you aren’t sure of the year. In that case, model and make or the vehicle’s manufacturing date, we can quickly also get you the exact replacement of your A/C compressor using the manufacturer’s part number right from the part. Often the part number is written within the compressor. However, these part numbers usually fade as time passes or become unreadable. If you don’t have these kinds of part numbers, call the vehicle manufacturer’s local dealer and ask for the OEM part number of the A/C compressor in your vehicle.


Things to Include With Your Purchase

Part of focusing on how to buy an A/C compressor needs knowing what other areas you should purchase and what sort of warranty you will get with your interests. Each compressor has a 1-year warranty if you make sure to switch the accumulator/drier and follow a few other installation instructions. Some have extended manufacturer’s warranty options too. Often, you’ll want to buy a lot more necessary A/C parts to be able to finish the installation correctly. Don’t be concerned, and some have kits offered that may save a little money when you buy each of these parts collectively.

A/C Compressor
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Type of Oil Your A/C Compressor Needs

Like every mechanical system, you must ensure that your A/C system remains lubricated, and A/C compressor oil is the lubes for the task. The A/C compressor needs lubrication for best functioning plus a long life since any time you have metallic parts rotating or sliding, they’ll fail quickly when they aren’t correctly oiled. This failure arises from quick wear and extreme heat accumulation. In addition, the A/C compressor in the car is operating hard to compressor refrigerant, typically R-134a, to allow the refrigerant to grow and build the cooling effect used to cool inside your vehicle. This process can create lots of heat and damage if improperly lubricated.

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An excellent tight seal inside the compression chamber is probably essential for a compressor to function. For example, your A/C compressor produces a low pressure to draw refrigerant to a partition. However, that refrigerant will be compressed to a high pressure either by a piston or a turning vane and compelled away from the chamber to the high-pressure side of the A/C system. Therefore, it is imperative for there to be a firm seal surrounding this compression chamber. If there isn’t a tight seal, high-pressure refrigerant can leak backward within the compression chamber, killing the compression effect, or fluid being compressed can slip throughout the pump into the low-pressure side of the A/C system, destroying the compression effect. To keep the seals tight inside your A/C compressor, you must ensure enough A/C compressor oil inside your A/C system to make appropriate lubrication to maintain the tight seal within your compressor.


Every automotive A/C system comes from the factory with the exact amount of refrigerant the system requires and the precise amount of A/C compressor oil pre-installed. Frequently, you can find an information sticker about your air conditioning system under the hood of your car, listing the amount of refrigerant in the system by weight and the amount of A/C compressor oil needed in a dry method. Unfortunately, working on an older A/C system is problematic because it is impossible to tell how much A/C compressor oil is in your system. For example, if you’ve had a slow leak for a year, you don’t know how much oil may have leaked out with the refrigerant. If the leak is high in your system, it could be very little, but if it is low or low-pressure, it could be a significant amount of oil.

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Another thing to consider is what type of A/C compressor oil your vehicle requires. You may be lucky enough to find the kind of oil on the same sticker that lists the weight of refrigerant your system needs, but if not, the only place to reliably find the amount of A/C compressor oil your system requires is by calling a dealership for your make of car. If you’re replacing just a component or two of your aA/C system, there are some general guidelines to estimate how much oil will be in those components when removed and therefore needs to be replaced when you recharge the system. You can find those guidelines and other A/C compressor oil information by reading this AC Compressor PAG Oil article. Once you’ve got the correct type of oil, you can use the Oil Injector to add the A/C compressor oil to your system.

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Labour and Part Costs

Labor costs for replacing the A/C compressor are based upon the mechanic, what vehicle you’ve, and which must replace parts in the system. Labour can vary from $300-$500. The price of an A/C compressor varies from $100-$600 based on your vehicle and the part condition you decide. For more info on and replacement part price of an A/C Compressor, click HERE.


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