4 Causes of Car AC Not Blowing Cold Air When Idle

4 Causes of Car AC Not Blowing Cold Air When Idle – If you are a new car owner, of course, the car air conditioner will not have problems. The air conditioner will blow cold air every time you turn on the air conditioning system. But it’s different if the car is several years old. The car has also traveled let’s say more than 100,000 miles so there is likely to be a problem, for example, a car air conditioner.

Your car’s air conditioner may suddenly not emit cold air either at idle or when traveling at a certain speed. If it occurs at idle, you may think that it is part of the engine warming up waiting for the engine to warm up before the AC will return to normal. But it turned out not to be so. The air conditioner when the engine is idling must remain cold. Then what is the reason and how to fix it?

Causes of Car AC Not Blowing Cold Air When Idle

This problem can occur in most cars regardless of the brand of your car. Poor AC unit maintenance is the main cause of car air conditioners not emitting cold air when idle. Checking the system from time to time is very important to keep it in good condition. Apart from that, let’s see if it’s possible for a car air conditioner to not blow cold air at idle.

Read more: 4 Causes of Black Smoky Cars and Overcome It

The condenser fan is damaged

Causes of Car AC Not Blowing Cold Air
Condenser fan damage is the first Condenser fan on Car’s AC system. Image source: LiveAbout

The cooling fan in the condenser is the first thing you should pay attention to if you find the car air conditioner does not emit cold air when idling. If the fan is damaged or cannot work at full power, then of course the fan cannot cool the heat coming from the Freon (refrigerant) through the condenser.

When the car is traveling at high speed, the condenser does not need a fan to cool the Freon because enough air passes through it. But, when the car is not moving, the fan is the only source that keeps the Freon cool.

In this kind of case, you should check if the fan connection is loose or not properly seated in the slot.

The engine is overheating

Causes of Car AC Not Blowing Cold Air
Image source: Naijauto

The second common reason for AC fan problems is the engine overheating. The compressor of the AC system transfers heat from the radiator to the condenser. When the car is overheated and both the fans in the radiator and condenser are not working properly for some reason, the system cannot cool the heat with maximum efficiency.

In this case, solving the engine overheating problem is of utmost importance. The air conditioner will cool down again when the engine is idle when the engine is back to normal. Whether it’s an engine oil problem or a cooling system, the engine must start working normally if you want to get a cold AC.

Low level of Freon

Causes of Car AC Not Blowing Cold Air

Freon is an important part when we turn on the AC. When the level is lower than the acceptable level, you will face the problem of the car air conditioner not emitting cold air at idle. The compressor can pump Freon more easily when the car is running at high speed on the highway but struggles when the car is idle.

For this case, it is clear that the addition of freon is mandatory for us to do. You can refill yourself if you know the procedure. But if you have trouble, submitting to an AC repair shop is the best way.

Debris in the condenser

Causes of Car AC Not Blowing Cold Air
Image source: Charm City Circulator

If there are foreign objects or dirt that get into the condenser and block the fins, the cooling process will not work properly, especially when the car is idle. These elements can also bend the cooling system and create the same effect. You will need to clean the condenser fins and other areas to resolve this issue.

Hopefully, this article is useful for you. If you have any questions, leave a comment below, we will answer your questions as a form that we want to share our knowledge with you.

How do I fix my car AC not blowing cold air?

Now when we discuss how to fix a car air conditioner that is not cold in our car. I will explain the steps to repair your car’s air conditioner from the simplest start. This simple step you can later do yourself, but for the complicated steps, you have to take it to a repair shop for further repairs.

Replacing the AC Air Filter

The first step is to replace your car’s air conditioning filter. This is a simple step and sometimes your car’s air conditioner is not cold just because of this trivial problem.

Causes of Car AC Not Blowing Cold Air
The AC filter is trivial. But this is sometimes even the most frequent cause of your car’s air conditioner is not cold. So, pay attention to this component and replace it if it looks dirty.

You can buy a car air conditioner filter at stores that sell auto parts. Pay attention to the size. If you are in doubt then you can take the old AC air filter as an example. The price for a car air conditioner is also very cheap and affordable.

After you get your new car air conditioner air filter, it’s time to replace your car air conditioner air filter. You can use the manual book to find out where it is. But most are on the opposite side of your car’s steering wheel. You can open the cover and then replace the filter with a new one. After the installation is complete, you can turn on the air conditioner and make sure the air conditioner is cold. If this doesn’t work, let’s move on to the next step.

Check AC Freon Amount

The second step is to check the amount of freon in your car’s AC system. You can do this step by looking at the condition of the freon in the freon tube of the AC system. If it looks empty then you need to add an AC freon.

Another way is to use a tool to measure AC pressure. The freon that runs out will cause the freon pressure in the car air conditioner to below and make the air conditioner not cold. This must use a special tool. So if you don’t have it, then you have to come to the repair shop to have your car’s AC freon pressure checked.

Causes of Car AC Not Blowing Cold Air

In addition to the two simple steps above, you should take your car to a repair shop for further inspection. Damage can be from the AC compressor, AC condenser, and so on. But there’s more to it than that, the machine is having problems. Car air conditioning also depends on the condition of the engine. If the car experiences a mild engine overheating, sometimes it will result in your car’s air conditioner. Or at least the cooling system on the engine has a problem then the car’s air conditioner has a problem.

FAQs – Causes of Car AC Not Blowing Cold Air

We often ask some questions about car air conditioners that are not cold while driving. Here are some of them.

Why is my AC running but not blowing cold air?

AC works fine but why isn’t it cold? The answer is that the AC freon runs out either because it is leaking or because the freon pressure is low. But it could also be because of other things, namely, the AC compressor is not able to pump freon to circulate properly throughout the AC system. For this problem, if you don’t have enough AC repair tools, it’s best to take them to a repair shop for further repairs.
How often do car AC compressors go bad?
If you ask how often will your car’s air conditioner fail? The answer is that it depends on the condition and maintenance of your car’s air conditioner. That is if you are in an area with heavy dust throughout the day and your air conditioner is turned on throughout the course of your life, then you should often take care of your car’s air conditioner. If not, it could be just a matter of months your car’s air conditioner will have problems. So, take into account your environment, usage, and maintenance schedule to make sure your car’s air conditioner lasts longer.

Can I drive my car with a bad AC compressor?

Yes, you can drive your car even if your car’s air conditioner is broken. Basically, a car air conditioner is a system outside of your car’s system. In both ICE cars and hybrid cars, the AC system is different from the prime mover system. Therefore, there is no problem if you want to drive your car in a broken AC condition. With a few notes; Don’t ride when it’s raining and snowing.

5 thoughts on “4 Causes of Car AC Not Blowing Cold Air When Idle

  1. Pingback: Causes of Damaged A/C Compressor in Car | mech4cars

  2. Greta James Reply

    My car’s air conditioner only blows warm air, which makes hot days very uncomfortable. Thank you for the advice that a condenser fan may be damaged. Since I don’t know much about cars, I think I will take mine into a service shop to help diagnose and repair whatever the problem might be.

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