What Causes a Car’s AC to Turn Off in Hot Weather?

What Causes a Car’s AC to Turn Off in Hot Weather? – Hot weather is very annoying for many people. Not only do you have to try to cool down so you can return to comfort, but it’s also bad for car drivers in hot weather conditions. Obviously, it would be a nightmare if we had to drive the car on a hot day when the car’s air conditioner stopped operating or was not cold enough. Everyone agrees that we don’t want to be sitting in a car when it’s nearly 100 degrees outside and the engine is heating up, constantly blowing hot air into the car. This is the reason why we need to find the causes that can affect the car air conditioner turning off during hot weather. So what are the causes and how to deal with our car air conditioner stopping working when it’s hot outside? Let’s find out the truth with us in this article!

What Causes a Car’s AC to Turn Off in Hot Weather?

The car’s air conditioner is not cool or sometimes it’s cool, sometimes it’s not… when the weather is hot, it’s a very common problem. This is a sign that the car’s AC system is having problems. It is important to check for the cause and treat it immediately to avoid the problem becoming more serious. Which of course affects the life of many important parts, causes fuel consumption, and affects your driving experience.


Car's AC to Turn Off in Hot Weather

Here are some problems that your car air conditioner might experience when driving in hot weather.

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Uncooled air conditioning system: This is a condition where the air conditioner has been running at a high level but you still don’t feel cool while driving your vehicle. In addition, there are situations where the air coming out of the cabin has a bad smell.
The air conditioner is completely uncooled: This is a condition where the air conditioner loses its cooling effect even though you have the cooling system turned on.

7 Causes of Car AC Not Working in Hot Weather?

The hotter the weather, the harder it is for your car’s air conditioner to work. The rise in temperature will put extra stress on your vehicle and the AC system. That ranges from batteries and v-belts to hoses and fluids. Of course that requires every component to work harder to keep the temperature inside your car cool. As the temperature heats up, it causes the coolant to expand and renders the temperature non-functional. These are the reasons that make your air conditioner stop working. However, there are still several other causes that can explain the condition of your car’s air conditioner stopping working in hot weather as follows.

AC filter clogged

The first thing that causes a car’s air conditioner to turn off in hot weather is the AC filter. This is the simplest component of a car air conditioner but often gets no attention. The problem is that even though the components are “not important”, this part can make your car’s air conditioner turn off during hot weather conditions.

A clogged AC filter is often one of the reasons the condition of the AC system stops working or runs normally but is not cold enough. Because it is responsible for filtering dirt and impurities. After a long time of operation, the air filter will be covered with dirt and that is a natural thing that can happen to any type of car. If we don’t take care of it periodically, dirt can easily accumulate into thick blocks to prevent wind from circulating inside your car, causing the internal fan to not draw in enough air.

Dirty Outdoor Units

Automotive manufacturers usually install this outdoor AC unit in front of the radiator and engine fan. This section acts as heat exchange, dissipation, and release of heat to the outside. If the part accumulates too much dirt, it will cause poor heat dissipation, seriously affect the cooling efficiency and prevent your air conditioner from cooling. Drivers should inspect the outdoor unit as soon as the air conditioner shows signs of this problem.

If you ignore this trivial problem, it can even cause the car’s air conditioner to turn off in hot weather. This will benefit you with nothing but trouble and distraction along the way.

Clogged Condenser

If the two causes above seem trivial, this time the problem is a bit more complicated, namely the condenser problem. The function of the condenser is to convert freon gas into liquid form. It occurs in the process of heat exchange. Obviously, in the process of exchanging heat, the system will push the hot refrigerant out and replace it with the air outside the car. If the condenser fails, the refrigerant stops flowing, preventing cold air from escaping. At that time, your AC system is unable to produce cold air which causes the AC compressor to overheat.

In extreme cases, the compressor will die and result in your car’s AC system shutting down. Unfortunately, this often happens during hot weather conditions. In hotter weather, the AC system will die faster.

Car's AC to Turn Off in Hot Weather

Refrigerant Gas Problem

The cause of the lack of gas in your AC system is that you may not have refilled the gas in a long time. This situation will cause the air conditioner to operate inefficiently, not blowing cool air into your vehicle.

Read more: Why does the Car A/C Heat up in Traffic Jams?

If there is excess gas, the pressure will be higher than normal. In addition, overcharging of gas can affect other components in the system, even causing an explosion. A clear sign of excess air conditioning gas is the phenomenon of the engine running slower, and the phenomenon of closing/cutting off the cooling process.
The third case that can make your air conditioner not cold is a refrigerant gas leak. At this time, the pressure will drop below the standard level and the air conditioning system will stop working.

Car AC Channels Freezing

The next cause that causes the car air conditioner to turn off when the weather is hot is the freezing of the channels in your car air conditioner. The indoor unit is responsible for absorbing and reducing the temperature of the air that passes through it. But over time, this part is dusty, easy to breed bacteria, and moldy, causing an unpleasant odor.

In the long run, the indoor unit will freeze, with solid ice adhering to the grilles and openings. So that makes it difficult for air circulation. In addition, the freezing phenomenon can also come from a malfunction of the throttle valve, air conditioner fan, or sensor system. A frozen indoor unit will cause the car air conditioner to stop operating.

An AC Electrical System Problem Has Occurred

There are times when analyzing a car’s AC system, you never pay attention to car AC electrical problems. We only focus on such as refrigerant gas and components that are common in the news. It is he who is responsible for controlling the operation of the entire system – if a circuit or other electrical component is not working, the air conditioner will not work. Therefore, the user should check the circuit, and the capacitor, … to identify the exact cause.

So when the weather is hot and your car’s AC is off, you also need to make sure that your car’s AC electrical system is in good condition.

The car AC fan is broken

Problems with the cooling fan are also one of the reasons your car’s air conditioner stops working in hot weather. If we turn on the AC blower, but it is weak or not cooling, it may be due to the following reasons: the power circuit is broken, the capacitor is broken, the contactor coil is broken, or the fan motor is short-circuited…

How to Overcome When Your Car’s AC Has a Problem in Hot Weather?

Car's AC to Turn Off in Hot Weather

Your car’s AC not working on hot days is another sign that the AC system is having problems. It is necessary to examine the cause and urgently fix it. We understand that having your A/C system not working in hot weather can be very frustrating when driving your vehicle. So we want to share with you some methods to prevent this problem.

Read more; 6 Causes of Car AC Making Noisy Sounds Suddenly

Your air conditioning system must operate at full capacity as the temperature heats up outside. So if you have to ride in such harsh weather conditions, it is better to turn on the air conditioner at a low speed. This will reduce the pressure on the cooling system while enjoying cool air while driving.

Clean and replace the AC filter regularly

A dirty air filter will reduce the amount of circulating air, thereby hindering the cooling process of the air conditioner. Therefore, users must pay attention to regular cleaning to ensure the effective operation of the equipment. If excessive dirt buildup occurs, the driver may consider replacing the air filter with a new one. We must pay attention to the replacement time, which is in accordance with the manufacturer’s recommendations and operating conditions. Normally, after the mileage ranges from 16,000 – 24,000 km, the car owner must replace the air filter with a new one.

Limit Driving in Hot Weather Conditions

When it’s hot outside you should limit your driving, avoiding the hottest time of the day can help you put less strain on your AC system.

Check the Entire A/C System

The driver must take the car to a repair center to have the technician check the entire system, and find the cause. Fixed the problem of why the car air conditioner would not work when it was hot outside. In addition, internal components also require thorough cleaning to ensure device operability is restored. If the cause of your AC not cooling is a faulty compressor, you will need to have it repaired or replaced. The cost of replacing a new one depends on the type of vehicle and the manufacturer of the AC compressor.

Routine Care

Routine maintenance is one of the important solutions for car air conditioning conditions that are not cold. Especially if the vehicle often has to operate with high frequency in dusty environments. Drivers should maintain it once a year to check and deal with damage immediately.

Conclusion: What Causes a Car’s AC to Turn Off in Hot Weather?

Driving without air conditioning, especially in hot weather, can be risky and challenging. This not only makes you feel uncomfortable but has the potential to pose a lot of health risks. So we hope our article will keep you cool on those extra hot days. If you have any questions, feel free to write in the comment box below.

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