How To Fix Car AC Not Blowing Cold Air? Six Common Causes

It’s the middle of summer, which means the temperature outside is sweltering and, inside your vehicle, the air conditioner is cranked all the way up to its highest setting. And the odds are that just when you need your car’s air conditioning the most, it will give up on you and start blowing air that is either not cold or even heated. So why isn’t the air conditioning in your automobile keeping you cool? How to fix car AC not blowing cold air?

At the Car Expert Group, we see this phenomenon rather often. And what we find is that the reasons why your air conditioner only heats or cools the air a little bit can range from simple to complicated and from cheap to expensive. Normal wear and tear, genuine damage, or components that aren’t performing properly might all bring about these issues.

How Does a Car’s Air Conditioning System Work?

The car’s air conditioning system cools the air inside by circulating refrigerant in different physical states in a closed loop. Each of these changes in the state is closely linked to the changes in temperature and pressure that happen inside the system.

To work properly, a car’s air conditioning system needs the right amount of refrigerant and clean air around it.

Main Components

These systems depend on a number of important parts, and each plays an important role in the whole system. The following describes these components, in addition to their overarching function:

  1. A/C Compressor

The air conditioner’s compressor is in charge of pressurizing the system’s refrigerant and cycling it through the system. This part has a magnetic clutch that will work when either a switched input or an electronic demand is made.

  1. Condenser

The condenser for an air conditioning system is a device that looks similar to a radiator. When air moves over a condenser, the refrigerant inside the condenser changes from its gas to its liquid state, causing it to shed heat along the route.

  1. Dryer/Accumulator

Your car is equipped with either an accumulator or a receiver dryer, and this is determined by the kind of air conditioning system that is installed. The first of these devices is unique to systems that make use of orifice tubes, while the second is an essential part of systems that make use of expansion valves.

A desiccant of industrial quality is used in these devices to soak up any moisture that may have gotten into the system.

  1. Metering Device

When it comes to controlling the flow of the refrigerant, all car air conditioning systems use the same metering device. Depending on what kind of system is being used, these measuring devices are put in different places. When it comes to accomplishing this task, many of these systems make use of an orifice tube, while others rely on an expansion valve.

Depending on what kind of system is being used, these measuring devices are put in different places.

  1. Evaporator Core

The evaporator core of an air conditioning system is a small heat exchanger that is often put under the dashboard of a car. As the refrigerant moves through the condenser of a car, it absorbs heat from the inside of the car and changes from a liquid to a gas.

Six Causes of Car Air Conditioners Not Being Cold

Thinking about how to fix car AC not blowing cold air? The following are the six reasons why your air conditioner is not properly cooling:

  1. Freon Leak

Before the hot air goes back into your car, it is cooled down by a chemical called Freon, which is a refrigerant. A significant issue may arise if there happens to be a leak in the system. Modern air conditioners can be pretty fragile, and they need a certain amount of freon to work right.

The source of the leak might be a faulty gasket, a broken hose, or even simply a loosened connection. First, we need to trace the components that are leaking. Then we can either repair them or replace them. Last, we may recharge the system with Freon.

  1. AC Needs a Recharging

Even the most efficient air conditioners may leak a small amount of refrigerant over the course of time. However, the process is normally so gradual that you won’t even be able to tell the difference. You may not even be aware that there is a difference of more than a couple of degrees in the present low temperature of the air conditioning in your vehicle.

However, if you do find that the air conditioning in your vehicle is not producing a cool temperature, it is possible that you are running short of freon. In point of fact, it’s one of the most typical reasons why the air conditioner in your automobile isn’t blowing as cold as it should be.

If your air conditioner has a leak, bring your car to an AC technician. He will be able to recharge your air conditioning system if it turns out that the refrigerant level is low.

  1. Blend Air Door is Stuck

When you turn on the heater in your vehicle, warm air from the engine compartment is drawn into your vehicle. When you turn on the air conditioning in your vehicle and attempt to cool it down, a mechanism known as a “blend air door” slides across your ventilation system. This door blocks the flow of warm air into your vehicle and opens the way for the flow of cold air from the air conditioning system.

When the blend air door becomes stuck, regardless of how well the rest of your car’s air conditioning system is operating, you will only continue to get warm air.  The blend air door is often repairable without the need for new components; however, it is typically difficult to access since it is located far beneath the dashboard.

  1. The Compressor Doesn’t Engage

The most important part of an air conditioner is the compressor, which squeezes the freon into a smaller space. When the freon eventually expands, the temperature drops to a very low level. When air is blasted over metal that is packed with freon, the air swiftly cools down as a result.

If your compressor is malfunctioning, the air won’t become as cold as it normally does. There is also a chance that your compressor isn’t working right because of low freon levels, an electrical problem, or a motor that is too hot.

  1. Broken or Blocked Condenser

The duty of the condenser is to convert the freon gasses back into a liquid state. If the condenser is broken or full of dirt and dust, the flow of the refrigerant will be blocked. In the event that this does take place, the air coming from our air conditioner won’t even be cool.

  1. Electrical Problems

The air conditioning in your vehicle is not cold because the reason might be an electrical problem. Your air conditioning system has a number of electrical components, one of which is the compressor. It might also be rendered inoperable by something as simple as a blown fuse.

The Bottom Line

Because high temperatures can happen in almost any month of the year, you should always make sure that the air conditioning in your car is working.

If your car’s AC isn’t working properly, take it to the auto electrician. If you’re lucky, it’ll only be a fuse.

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