Car Air Conditioner Troubleshooting Guide

The air conditioner is one of the car’s essential components because it can determine passengers’ and drivers’ comfort. 
Especially in summer, air conditioning plays a vital role in delivering cold temperatures in car cabins. Even in the rainy season, air conditioning also helps drive safer as it makes the windshield free of fog. 
Therefore, the right car air conditioner troubleshooting crucial for you to know. 

It’s not a smart idea to drive when it rains with the windshield open because water can get into the car through the window gap. Although it feels more comfortable, car air conditioning also often have problems.


For example, have you ever been washed on sweat in the car even with maximum AC settings? Is there a bad odor in the vehicle when AC is turned on? These unpleasant things can happen due to the poor treatment for car air conditioners.

These are some common problems that often arise due to improper treatment of air conditioning. The car cooling system is a commonly used component. 


This component requires special attention to remain durable and maintained. In general, car air conditioners’ problems will appear when the car has been used for two years since it was first used.

Other problems may occur if the air conditioning is not equipped with a cab filter. Usually, the problem is that the temperature is not cold or the blowing is not strong enough. 


If the question arises, this is most likely caused by errors while treating car air conditioning, not because of damage to the AC components.

Dirty air conditioning components such as dusty evaporators will reduce cabin air circulation. Consequently, the condensation process is not optimal, and the AC performance will decrease. 


To ensure the car’s air conditioning is functioning correctly, we will provide tips on how to treat the air conditioning quickly and adequately.

Car Air conditioning problems

Some of the causes of car air conditioning problems that often occur are:

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Bad smell

The bad smell that fills the cab when air conditioning is activated is one of the most common issues. If you also find the same problem in your car, then several factors may be the cause, including:

Low-quality car air freshener

The bad smell usually occurs due to the use of low-quality automobile air fresheners. But, not all car air fresheners are made of quality materials. Air fresheners made from low-quality materials cause the evaporator to become dirty. Consequently, the maintenance of air conditioning cars becomes harder.

Dirty Cab

Not only is the use of a low-quality car air freshener, but dust and dirt cabins are also other causes. 

Dusty cab conditions usually occur because you drive with open window glass many times, or dirt may come from passenger footwear. 

If not cleaned immediately, dust and dirt will go into the evaporator and become a medium of mushroom growth that causes an unpleasant odor in the cabin when you use air conditioning.

Cigarette smoke

Bad habits of drivers and passengers such as smoking are one of the causes of unpleasant odor arising from car air conditioners. 


Nicotine from cigarette smoke will stick to AC’s evaporator, making this part slimy and producing an unpleasant odor.

The car air conditioner is not cold.

Car air conditioners that are not cold when turned on seem to be the most common car owners’ problem. 


But if you bring this problem to an untrusted workshop, they readily say that the cause is freon, and needs to be refilled.

However, the way to care for air conditioning is not necessarily related to Freon because it will not run fast for a long time. 


Although a reduced freon is a sign of damage or leakage in the air conditioning, you should first check whether the problem is caused by running out of freon or other factors before reloading Freon.

Some causes of abnormal car air conditioner temperatures are:

Leakage in hose or pipe

Leaks in the car’s hose or air cooling system usually occur not because of an error in the maintenance of car air conditioners. But due to age of use, improper parts, non-genuine components.

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Evaporator and Condensor damage

The damage that occurs in the evaporator and condenser due to prolonged use can cause the AC car to not cold when turned on. 


The evaporator and the damaged condenser can be caused by dirt and clogged by other objects such as gravel.

Compressor damage

Car air conditioners that are not cold can happen because of damage to the compressor. Usually, the sound comes from the engine where the compressor is attached. 


Indeed, observing all components during the maintenance process must be done so that the air conditioning remains durable.

8 Ways to Take Care of the Car’s AC to Keep it Cold and Durable

Here are nine ways to treat air-conditioning to keep it fresh, durable, and work well:

1. Keep the car cabin clean

Routinely clean the cab from dirt and dust, especially after you drive or after transporting many passengers. 


The carpet on the front is the most easily stained area. Therefore, this section needs to get special attention to not trigger problems on car air conditioners.

2. Don’t often drive with open windows

Ensure you don’t usually drive a car with open windows because it will cause dust or dirt from the outside into the car. 

Dust or dirt will enter and pollute the AC. When this happens, the performance of the machine is not optimal and causes an unpleasant odor. 

Drive with closed windows is a simple way to treat air conditioning cars.

3. Do not smoke in the car

Avoid smoking in the car, especially when you turn on the air conditioning. When cigarette smoke enters the air-conditioning, the nicotine content will contaminate the evaporator. 


In no time, the evaporator will be slid, then the AC releases the unpleasant odor.

4. Wait until the car engine is stable before turning on AC

Choose a cool location and not be exposed to direct sunlight when you park your car. You can prevent the cab from getting hot quickly, and the air-conditioning doesn’t need to work too hard when turned on.

5. Clean the condenser

Make sure to clean the condenser components when you wash the car. A damaged or dirty condenser is one of the causes of the auto AC problem.

Remove dust and dirt sticking to the condenser until thoroughly clean because it can stick in a long time and cause leakage and corrosion.

6. Cab filter installation

Install a cab filter that prevents dust and dirt from being sucked in by air conditioning and pollutes its evaporator. 


Cabin filters should be checked regularly when the car is in service. Ask the mechanics to spray them to be clean, or you can replace them with new ones if they’re not feasible to use.

7. Check the Condenser fan rotation

If the car air conditioning system comes with a new fan or a condenser fan, then you need to check the rotation regularly.

8. Check your car Rpm

Try checking the car rpm when the AC is in operation. An overly low or inappropriate Rpm can affect your car’s air conditioning performance.


That’s how to take care of the air conditioning car to keep it cool and can function properly to cool the car cabin and durable. 

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The correct air conditioning treatment can make it sustainable and prevent it from fatal damage to the car’s air conditioning system. 
Treating air conditioning should be done regularly to keep the maximum AC performance even though it is frequently used.

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