How to fix your car AC in a few steps

When you have air conditioning, it’s easy to take it for granted until you don’t have it. When the temperature outside is rising in the summer, the last thing you want to do is be confined in a car that is blowing hot air out of the vents… or in a car when the air conditioning isn’t working at all.

Despite the fact that Ohio is recognized for its mild summer temperatures of around 80 degrees, the heavy humidity can make it feel hotter and stickier. In hot weather, being in a car without air conditioning is not just inconvenient; it may also be dangerous, as cars heat up quickly. You’re at risk of dehydration and perhaps heat stroke if you do this. You don’t have to put up with a stuffy, unpleasant car, and you don’t have to rely on a mechanic to fix it. The most difficult part of determining the best solution is determining where to begin.

fixing car ac

Check out this article for three things to look for before heading to the mechanic so you can figure out what’s wrong with your temperature control. You can save some money by doing so. In this article, we cover the FAQs: Why is your air conditioning not working? What are the components necessary for AC to function?

Read more: Understanding automobile air conditioning system

Why is my car AC not working?

Air conditioners, like most things beneath the hood, can break down for a variety of reasons. Knowing what to check for might help you figure out why your car’s air conditioning isn’t working and what steps to take next. The followings are five common reasons your AC stop working:

  • Refrigerant Leaks
  • Broken Cooling Fan
  • Bad Compressor
  • Faulty Condenser
  • Electrical Problem

Refrigerant Leaks

This is one of the most prevalent reasons for a car’s air conditioner not working. Leaks can occur for a variety of reasons; they could be the consequence of rubber seals and hoses failing over time, allowing the refrigerant, Freon, to escape.

The major hazard when this happens is that moisture can enter inside your car’s cooling system and mix with the refrigerant, which can lead to no cool air in your car.

Moisture and Freon combine to form a toxic acidic mixture that can corrode your air conditioning system and cause lasting harm. As with any other form of leak, you’ll want to get this fixed as soon as possible so that it doesn’t continue to cause difficulties for your vehicle.

Broken Cooling Fan

Your car utilizes cooling fans to convey the refrigerated air into the cabin, much like you need blowers to push the air conditioning through the vents in your home. There will be no air coming out of the vents if there is an issue with the fans.

Cooling fans might stop working for a variety of causes, including blown fuses, an electrical short, or being fractured by road debris. Fortunately, this is a pretty straightforward repair; your mechanic should be able to swiftly replace it and get you back on the road.

Bad Compressor

Your air conditioner relies on a compressor to keep the air flowing, but that refrigerant won’t move if the compressor isn’t working properly. The long cool seasons of fall and winter mean that many Ohioans don’t run their air conditioning for several months, and one of the main reasons a compressor goes poor is from not being utilized for long periods of time.

A compressor can potentially cause issues if the compressor’s clutch becomes jammed. If it becomes caught in the “on” position, your air conditioner will run continually, and if it becomes stuck in the “off” position, the compressor will not engage. You’ll need to have your mechanic look at what’s causing your compressor to malfunction.

Faulty Condenser

The condenser is crucial because it takes humid air from the air compressor and depressurizes, cools, and liquefies it. To put it another way, it aids in the cooling of the air. It could be a sign of a failing condenser if your air conditioner isn’t cooling as well as it used to.

Electrical Problem

Electrical problems with your car’s air conditioning might be caused by a variety of factors. Failed switches, a blown fuse, an issue with the control module, or something else could be the cause. Fuses can short out, causing the air conditioner to stop working, or a loose connection can cause an electrical short that can be quickly repaired.

While electrical problems in the air conditioning system are usually simple to rectify, they must be handled right once because they can lead to acid accumulation. Acid accumulation can seriously harm your vehicle, necessitating the replacement of the complete air conditioning system. This can be avoided by staying on top of problems.

Read more: Understanding an Air Conditioning System

What if my AC still did not work?

If the air conditioner is still unresolved, consider checking the following components:

  • AC compressor and Clutch
  • AC Accumulator/Drier
  • AC Orifice tube/ Expansion Valve
  • AC Condenser
  • AC Evaporator Core


AC compressor and Clutch

The refrigerant (Freon) is circulated throughout the system by the AC compressor, which is a spinning pump.

Leaks in one or more seals, as well as the compressor itself, are common problems. Particle pollution caused by worn parts inside the compressor is a common cause of compressor failure. The engagement clutch, also known as an AC clutch, might fail, rendering the compressor useless.

Check for visible system leaks that appear green and oily if the refrigerant level is low. Internal components that are failing due to regular wear or low AC Oil levels due to leakage. The AC clutch has failed. A blown fuse, a defective pressure control switch, a bad dash control module, or a broken circuit wire can all cause the AC clutch to lose power. Before replacing, inspect and test it.

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AC Accumulator/Drier

The moisture is collected and absorbed by the Accumulator/Drier. Moisture is poisonous to the interior components of the system, and it can also harm the AC compressor. You may have an accumulator or a receiver/drier depending on your car.

Internal failure allowing desiccant material to enter the AC system is a common problem. This material in the wrong areas, like sugar in the gas tank, can cause severe issues. Over-saturation of the desiccant substance due to leaks might cause compressor damage.

AC Orifice tube/ Expansion Valve

The refrigerant flow via your air conditioning system is filtered and regulated by the AC orifice tube/expansion device. You may have an orifice tube or an expansion valve depending on your car.

The most common reason for failure is contamination. The expansion device could be a problem if the system pressures are too high or too low. But first, double-check that the refrigerant levels are correct and that the radiator/A/C Condenser fan(s) is operational. Always check and test before replacing anything.

AC Condenser

The air conditioner condenser resembles a radiator and operates in conjunction with the radiator fan (s). The hot (gaseous) refrigerant that absorbed heat from within the car is cooled by air moving across the AC condenser tubes. The refrigerant is then returned to a liquid condition, allowing it to enter the evaporator core and absorb more heat from the interior.

Refrigerant leaks are a common issue. Poor cooling can be caused by contaminants in the AC Compressor or AC Accumulator/Drier impeding the flow of refrigerant. Inspect the radiator/AC cooling fan motor while examining the AC condenser (s).

AC Evaporator Core

The evaporator in your air conditioner works like a giant ice cube with holes in it. It permits heated cabin air to travel through the core, quickly cooling it before blowing it back into the cabin. The AC heater blower motor assembly is responsible for the cold air coming from the dash vents.

The most common reason for failure is a leak caused by age and wear. The best technique to check for leaks is to use an electronic leak detector. Pay close attention to the water drain tube on the AC evaporator box. To find a leak, use the tester. If there are significant leaks, a green and greasy substance may develop in the drain tube.

Watch the video below to learn how to fix a car AC:

Read more: How to choose a turbocharger for your car?

How do I plan ahead to stay cool every summer?

There are no warning lights to alert you to problems with your air conditioning system, unlike many other systems in today’s cars.

Because you don’t want to wait until a problem arises, which all too often occurs at the most inconvenient times, it’s a good idea to bring your car in before the summer arrives to ensure that the hoses and fans are in good working order, that no leaks are visible, and that your refrigerant levels are adequate. (It’s also a good idea to do this as part of your spring tune-up.)

Having your air conditioning system tested before summer begins, or as soon as you spot a problem, may save you a lot of aggravation, time, and money. It will also help you stay cool throughout the heat.

Read more: Understanding Refrigeration


An air conditioner is one of the components in automobiles that bring comfortable driving during summer. This system can go bad unexpectedly and required to fix for it to keep up the good work. That is why this article is meant to teach how to fix your car AC and why your car AC can develop a fault. This article also shared some of your AC components that can make it stop functioning.

I hope you learn a lot from the reading, if so, kindly share with others. Thanks for reading, see you around!