Kia Carnival air conditioning problems 

Kia Carnival

The Kia Carnival is a minivan made by Kia since 1998. This MPV is spacious, practical, and comfortable, making it ideal for a family. Nonetheless, it also comes with several issues, including air conditioning problems. But what are the Kia Carnival air conditioning problems? 

Some of the common Kia Carnival air conditioning problems are warm air, weak airflow, mold buildup, faulty condensers, and a faulty compressor. Additionally, several users have reported having refrigerant leaks, and clogged air filters. 

What are the common Kia Carnival air conditioning problems? 

Warm air 

A common air conditioning problem with the Kia Carnival is the car blowing warm air. Several users have complained about this issue. Note that this problem is usually caused by low refrigerant levels. If the refrigerant level is extremely low, then the evaporator cannot fully cool, and one side of the dash vents will be warmer than the other. 

To fix this problem, you will have to refill the refrigerant to its ideal level. 

Weak airflow

Another problem that many Kia Carnival users have complained about is the A/C having weak airflow. This could be caused by a loose hose, mold or mildew buildup, a compromised seal, or an old ventilation fan. One of the main signs of weak airflow is a strange or sweet smell that gets intense when the A/C is on. 

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To resolve this problem, you will have to visit a professional mechanic to fix the underlying problem. 

Mold buildup

While this problem is not very common, several Kia Carnival owners have reported this issue. Mold buildup can trigger allergic reactions if inhaled. Note that the fungi and bacteria grow mostly in the evaporator core and immediate areas, because of humidity and moisture that forms when the AC is in use. On top of that, mold can form in the ductwork. 

To help reduce mold buildup in the AC system, you should run the fan for the last 10 minutes after using the AC. 

Faulty compressor

Like most A/C issues, the compressor also becomes faulty normally because of low refrigerant levels or a leakage of the refrigerant. Some of the signs of a failing compressor are lukewarm air, ECU error, leaks, strange noises, and seized compressor clutch or belt. 

To rectify this issue, you should visit a professional mechanic and have the compressor inspected. If the A/C has low refrigerant, it should be refilled. But if the compressor is damaged, you should replace it. 

Clogged air filter 

If the cabin air filter is clogged, the A/C system will place extra strain on the A/C blower. As a result, there will be reduced airflow from your car’s A/C. This is common if you usually drive your Kia Carnival in dusty or polluted environments. 

To fix this issue, you will have to clean the clogged air filter. But if it’s damaged, then you will have to replace it. 

Refrigerant leakage 

Refrigerant leakage usually happens when the car’s air conditioner compressor places excess pressure on the car’s system. As a result, it causes a small hole to develop, which enables all the car’s refrigerant to escape. When this takes place, the car A/C won’t work as usual. 

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You can fix this problem by refilling the refrigerant or fixing the underlying issue. 

Faulty condensers 

The condenser in the Kia Carnival can become faulty because of seals and pipes that have deteriorated, enabling the refrigerant to leak out and air to get in. Therefore, the air that gets in can cause ice crystals to form, which damage and block the condenser. 

The best way to fix a faulty condenser is by replacing it with a good one.  


Why is my A/C running but not cooling?

If your air conditioner is running, but not cooling temperatures inside, it could be due to a blocked or clogged condenser coil. When operating as needed, the condenser fan draws air into the outdoor unit through the condenser coil to pull heat energy out of your home. 

How do I know if my Kia Carnival AC compressor is weak?

The air conditioner compressor is responsible for compressing refrigerant vapor. However, if it’s weak, the A/C won’t function as needed. Some of the signs of a weak or faulty compressor are noises coming from the engine compartment, the compressor clutch not engaging, AC not being as cold as it should be, and broken suction lines. 

How can I make my air conditioner colder?

If the car A/C is not blowing cold air, there are a few things that you can do to make it colder. The best thing to do is to turn the fan to its maximum speed and ensure the airflow is set to “outside” mode. After you’ve forced out some of the humid, hot air that’s accumulated in the car, turn on the A/C and switch to “recirculate” airflow mode. 

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What is the main reason why air conditioners stop working? 

The main reasons why you’re A/C isn’t working are because of a low refrigerant level, a broken blower, a broken A/C condenser, cooling fan problems, and a bad A/C compressor. Furthermore, the air conditioner may stop working due to A/C evaporator issues and electrical problems.  

How do I tell if my AC is low on refrigerant? 

The refrigerant is one of the vital components of an A/C. So, knowing if it’s low is very crucial for the smooth operation of the air conditioner. Some of the signs of low refrigerant A/C not blowing cool enough air, taking longer for the A/C to cool off, low pressure on gauges, and A/C clutch failure to engage. 


Now that you know some of the common air conditioning problems with the Kia Carnival, it is crucial to take care of your car to avoid most of these issues. Some of the air conditioning problems that Kia Carnival owners should be aware of are warm air, weak airflow, faulty compressors, and clogged air filters.

Even with these issues, the Kia Carnival is still a reliable and exceptional minivan. With good care and maintenance, most of these problems can be avoided.

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Edwin Odipo

Why do you love writing about cars? Cars make our lives easy. You can visit your distant friend, relative or even rush to the grocery store a few miles from your home with a lot of ease. Imagine how life was before the invention of cars?? To me, cars are a blessing that made life more convenient.

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