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A Troubleshooting Guide for Your Car’s AC

Apr 02, 2021

When you start having issues with your car’s air conditioning system, it can quickly become very inconvenient. If you are in the throws of summer, the last thing you want is to be forced to endure the heat because of a broken or malfunctioning AC system. If your vehicle is blowing out hot air when you turn on the air conditioning, or if you are having any sort of issue with this basic function, it may be time to call in a professional.


In this quick troubleshooting guide, Poston Motor Co. explains the signs and causes of a broken or malfunctioning car AC system. If you’re interested in learning more, keep reading this article!

The Best Car AC Service in Cumming GA

How do I know if my car’s AC is having problems?


There are some pretty clear indications that occur when your vehicle’s air conditioning system starts to break. Some common signs of a deteriorating AC include:

  • Temperature Fluctuation: When you first turn on the cold air in your car, you should be able to immediately feel the artificial breeze it creates. If the air coming from your front vents is warm, or if you notice a strange fluctuation between hot, warm, and cold air, then your vehicle’s AC system is definitely malfunctioning.
  • Strange Noises:  Even if your air conditioning seems to be working in your car, and is blowing out cold air, you could still be experiencing issues with your compressor. A surefire way to tell if this is a problem is to listen for any odd sounds that occur when you turn on the AC. If you hear a clattering or squealing noise, this can indicate a problem with your air conditioning system’s compressor.
  • Noticeable Oil Leak: The lines and fitting that connect your car’s AC system components together may leak if they experience any sort of wear, tear, or damage. When this happens, you may notice that your vehicle is leaking oil. You may at first think that this is engine oil, but it could instead be the compressor or refrigerant oil from your car’s AC system.

Common Causes of AC Breakage / Malfunctions


There are plenty of reasons why people experience issues with their car’s air conditioning system throughout the course of vehicle ownership. Age is perhaps the most common cause when it comes to these problems. Heat, vibration, wear, and tear can all contribute to problems with a dated AC. These natural occurrences can cause a refrigerant leak to spring up, which will prevent your system from being able to provide cool air to your vehicle. The only solution to this issue is an AC recharge or repair service from an auto mechanic shop near you.

What to do when you notice problems with your car’s AC

At the first sign of an issue, you need to take your vehicle in for an auto repair service. You should never put off seeing a mechanic for your car’s air conditioning system. Not only will you be suffering without cooling air, but your vehicle will be suffering as well. The longer you go without an AC repair, the worse the damage will become.


When you take your car in for an AC recharge and repair service, your local mechanics will first evaluate each component of your AC system for leaks or damage. After this is complete, there are two things that can happen:

  1. If no leaks or damage are found, then your mechanics will flush out the old refrigerant and replace it.
  2. If leaks or damage are discovered, then your mechanics will consult with you on the best course of action to take in regards to repairs.


Depending on the capabilities of your local auto repair service, you may be able to get your vehicle’s AC system fixed, flushed, and refilled all at one place. Your mechanic will be able to give you more information on what can be done on-site, and will be able to provide you with an estimate of the service cost.

Where to Find The Best Car AC Service

The experts at Poston Motor Co. can make quick work of your current problem with your car’s AC. Our technicians will be able to diagnose the cause of your issues, and will be able to perform a repair and flush service for your car’s air conditioning system. Before any work is done, we will walk you through our process and notify you of the final projected cost for the service. Trust Poston Motor Co. to have your car ready for summer with our top-rated car AC services. 


Call us today to get started: 678-455-5246.

Frequently Asked Question About Poston Motor Co. 

  • Why is my car air conditioner not blowing cold air?

    There are many reasons why your air conditioner may stop blowing cold air, including faulty cooling fans, leaking refrigerant or a bad compressor. These issues all need to be repaired by a professional at your local auto shop. 


  • How do I know if my car AC is broken?

    Your car AC is likely broken if you notice a decrease in the level of cool air it provides or if it stops cooling altogether; if it makes weird or unusual noises when it is on; if you notice any leaks or condensation; or if you smell an odor when you run the AC. There are also many other signs of a broken AC, and if you notice any of them you should contact an auto shop near you, like Poston Motor Co., to fix the problem and get cool air restored to your vehicle. 


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