Warm air when the air conditioner is turned on. Why is the air conditioner blowing warm air. Poor condenser cooling

Your air conditioner is blowing warm air because when the fan is running, something turns off the cooling mechanism. Causes include simple things like thermostat settings and poor air flow, but there can also be problems that can cause big problems like electrical problems and refrigerant leaks.

We'll start with simple problems you can fix, and when you need professional skills to diagnose and fix a bigger problem.

1.Problems with thermostat

If you're worried about your home or your air conditioner blowing warm air, the first thing to check is the thermostat. It is a fact: they are faked, children accidentally fall into it with a flying object, or a colleague turns it off because it is too cold.

Make sure the thermostat is set to COOL and the fan is set to AUTO. And, of course, the set temperature is lower than the actual air temperature.

2.Dirty filter

Reduced air flow is one of the most common problems that can prevent your air conditioner from cooling. Oddly enough, your air conditioner really needs warm airflow over the coils to function properly. The air conditioner filter is designed to remove dust and dirt from the air passing through the equipment. However, an air filter clogged with dust and debris can completely block air from entering the system. When this happens, the coils are unable to remove the heat. Therefore, the fan of your system simply blows back into your space.

If you haven't had your system for some time and your AC is blowing warm air, the next step is to check the air filter and change it if necessary.

3.Ventilation holes blocked or blocked

Here is another airflow problem that can cause warm air to be blown out of the air conditioner. Is it possible that the ventilation grilles were closed in winter and never opened? Or (this is common in offices!) Maybe you have furniture or other obstacles blocking them?

Make sure all registers and returns are open and allow air to flow freely.

4.Disconnected or leaking ducts

It is also possible that you have airflow problems that you cannot see ... in your ducts. If the duct has holes, cracks, or is completely disconnected, air may not reach the device. Or, the chilled supply air can be wasted in your walls, in the attic or downstairs, and as a result, the air conditioner blows out warm air.

If channels are available, you can take a look at them. Damage often occurs during construction projects, or from being hit by birds or rodents. On a second glance ... this might be an area where you'd better get professional help to check the condition of your airway.

5. Power loss for outdoor unit

Many air conditioning systems have an internal evaporator / air cleaner and an external condensing unit. If the air cleaner is working properly, the fan will still blow air into your space. But without the operation of the condensing unit, there will be no cooling; therefore, your air conditioner is blowing warm air.

This scenario can happen when your capacitor bank loses power, often due to a blown fuse or a tripped circuit breaker.

IMPORTANT Never try to diagnose electrical problems yourself unless you are a qualified electrician or HVAC technician. However, there is one thing you can check: your emergency switch. It is possible that it was accidentally turned off when the condenser unit was turned off and this could also lead to blowing out warm air.

6 dirty condenser coils

One of the important functions of your condensing unit is to generate heat outside your room. The condenser coil is responsible for this job. As it is exposed to the elements, it can be loaded with dirt and dust, not to mention leaves and debris. Eventually this prevents the coils from working and your system cannot cool effectively, so the air conditioner blows warm air.

7.Leak of refrigerant

Refrigerant (Freon) is a substance that flows through your air conditioning system and causes refrigeration. It is a closed loop so you do not need to add refrigerant if there is a leak in your refrigerant line or coil. When this happens, your system loses both refrigerant charge and cooling capacity. Depending on the size of the leak, cooling losses may occur slowly or immediately, but your air conditioner will end up blowing warm air.

Although modern models of air conditioners and split systems provide a heating mode, still most users use the equipment only in the summer in the cold. Therefore, the equipment has a downtime. But then the hot time began, you turned on the air conditioner after winter and found that:

the split system does not cool, but blows with warm air;
the air conditioner started up, worked and stopped cooling, now the air conditioner is blowing warm, and the temperature in the room does not drop.

We have prepared an article on the reasons why the air conditioner blows, but does not cool the air, to help you understand the situation and decide whether to call a master.

Does the air conditioner really not cool? We carry out diagnostics

Before looking for problems in the split system, check for external causes that are not related to the equipment. In addition to the cooling capacity of the air conditioner itself, the cooling of the room is affected by:

Working hours of climatic technology. Customers often forget that when the air conditioner is turned on, it does not instantly cool the indoor air. For a noticeable decrease in temperature, it takes 10, 15, 20 minutes. Depending on the size of the room, the temperature outside and inside, and the capacity of the split system.
Correspondence of the split-system power to external parameters. Naturally, a low-power air conditioner will not be able to significantly cool a spacious room when it is hot outside and the room is very hot. When choosing equipment, it is often overlooked that the load can be peak, and the air conditioner must be taken with a margin of "power".
Isolation of the room. An air conditioner in an apartment will not cool well if there are "holes in the tightness" of the room: open windows, doors, a working ventilation system. Additional influx of heat from outside or forced outflow of cold air from the room are the reasons that lead to poor cooling.
"Blocked" air inlet or outlet, another reason. Obstacles in the form of curtains, blinds, furniture interfere with normal air circulation and, as a result, cooling.

If there is enough power, the entrance and exit are free, the windows and doors are closed and enough time has passed, but it has not become cooler, then it is necessary to diagnose the equipment. Simply put, measure the temperature of the air entering and leaving the air conditioner.

The inlet temperature is measured at the air intake grilles. Place the thermometer on the body or hold it in your hand. The output is measured in a stream from the outside or by slightly pushing the thermometer inward through the blinds.

Attention! Do not push the thermometer deep into the housing. It can get caught in the fan blades.

In a working air conditioner, the temperature difference at the "inlet-outlet" is in the range of 7-15 degrees. If you just turned on the air conditioner for maximum cooling, and the difference is less than these values, then your split system does not cool well due to some internal reasons.

In addition, you can check the outlet flow temperature with the nameplate values. Usually, the equipment passport indicates the temperature of the cooling mode at the outlet, for example, 6-14 ° C for non-inverter systems. When turned on, inverters give out the same parameters, and after reaching the set temperature in the room, they slightly raise the output value - up to 12-17 ° C degrees. If the temperature of the outlet flow exceeds the rating, then you should look for a problem inside the air conditioner.

The air conditioner is blowing warm air, what problems can be eliminated by yourself

You can deal with some of the causes of poor cooling yourself. The table summarizes the main ones, and provides recommendations for eliminating equipment failure.

Sign	Possible reason	How to fix
The air conditioner does not cool the room well.	The temperature is set to high in the settings. For fast cooling, it is recommended to select the minimum. And then switch to a comfortable one.	Correct the cooling mode.
The air conditioner turns on, but does not cool.	Fan mode selected. And the air just circulates without cooling.	Select a cooling mode.
The air conditioner blows warm (for models with heating mode)	Heating mode on by mistake.	Set the cooling mode.
Cooling is weak. The indoor unit of the air conditioner may leak and / or freeze.	(coarse and fine cleaning). Dust, wool, hair clog the filters and settle on the heat exchanger plates. Because of what the heat removal from the evaporator worsens: the radiator does not give cold well to the air, which leads to poor cooling. If the indoor unit is heavily soiled, the evaporator tubes may freeze. Dust can also clog the drain hose, then condensation will remain in the pan and then drip from the indoor unit.	Clean filters. To get them open the cover of the unit. How to do this is described in the instructions. Then remove the filters and rinse well under running cold water and replace the clean ones. *Attention!* Do not use hot water, filters may be deformed. If you yourself are afraid to "climb" into the indoor unit of the air conditioner, call the master.
Poorly cools, the compressor in the outdoor unit becomes silent.	The radiator of the outdoor unit is dirty. The heat exchanger has accumulated dust, fluff from plants, plaque from the "exhaust" of vehicles, the rotation of the fan may be difficult. All this impairs the heat exchange of the condenser with the environment and reduces the refrigerating capacity of the air conditioner. In addition, the compressor may shut down due to overheating.	The outdoor unit needs to be cleaned. You can use a steam generator, pressure washer or mechanical means (brush, sponge). If the house is multi-storey, the services of an industrial climber may be required.
Warm air blows. The split-system compressor located in the outdoor unit is silent or turns on for a short time (2-3 minutes) and turns off again.	Low voltage in the network. Lack of voltage often leads to overheating of the rotor winding and the shutdown of the motor by a thermal relay.	Install a voltage monitoring relay. It can be used separately or in pair with the stabilizer.

If the elimination of these problems did not improve the situation and the cooling is still weak or absent, then the problem is in the components and parts of the climatic equipment. In this case, a full diagnostics by a specialist and service repair are required.

Does not cool the air conditioner in the apartment - reasons that require professional maintenance or repair

The symptoms of malfunctions are similar, but they arise due to wear or malfunction of parts, damage, internal contamination of units and mechanisms. Based on the experience of repairing air conditioners, "RemBytTech" masters have compiled a list of major equipment breakdowns.

Sign	Possible reason	Repair or replacement	Price* (only work)
The air conditioner blows poorly and does not cool well. Water may drip from the indoor unit of the air conditioner, and the evaporator tubes may freeze.	Indoor unit filters clogged(coarse and fine cleaning). Dust, wool, hair clog the filters and settle on the heat exchanger. Heat removal from the evaporator deteriorates, and the radiator does not transfer the cold well to the air flow passing through it. In addition, heavy dirt on the indoor unit can impede the rotation of the fan and freeze the evaporator tubes. When the drain hose is clogged, condensation remains in the pan and then flows out of the indoor unit.	The filters are cleaned after removal. If the evaporator and fan are dirty, the entire indoor unit is disassembled to clean the components.	from 1900 rub.
The air conditioner blows normally after winter, but does not cool well.	There is not enough freon in the air conditioner. Even in a sealed system, up to 7% of the refrigerant can evaporate per year. Therefore, climatic equipment requires annual maintenance (cleaning, refueling).	Refueling with freon is in progress.	from 2RUB 300
There is airflow, but there is little or no cooling. At first, the compressor in the outdoor unit works without stopping, but the air conditioner, nevertheless, does not cool well. Then, the motor stops turning on, and the split system stops cooling. On models with error indications, a low pressure message appears.	There was a leak of freon from the system. At first, with a small amount of leakage, the air conditioning compressor located in the outdoor unit turns off less and less for rest, despite the weak cooling. Then, as the refrigerant evaporates from the system, the equipment starts blowing warm air at room temperature, and the motor stops and does not turn on. Typically, leakage occurs due to flared joints of inter-block pipes or destruction of assembly seams.	The technician is looking for a refrigerant leak. Then it seals the leak, evacuates the system (to remove moisture and air) and refills the system with freon.	from 3400 rub.
It blows normally, the compressor in the outdoor unit hardly turns off, but the air conditioner does not cool at all or the cooling is weak. It can also freeze the air conditioner tube to the evaporator.	Capillary line blockage... Due to the clogged capillary tube, the pressure difference at the inlet and outlet of the capillary increases, therefore part of the freon boils and gives off cold even before the evaporator of the air conditioner. As a result, the refrigeration capacity of the split system drops, and the equipment tries to compensate for its lack of constant operation of the compressor. With a complete blockage of the pipeline, the refrigerant does not circulate, the compressor runs idle, the air remains warm.	Partial blockage is removed by blowing with air under pressure. This operation is also called blockage pushing. Hydraulic cleaning and solvents are used to remove stubborn blockages. In especially difficult cases, when it is impossible to remove the blockage, the capillary tube is desoldered and a new one is soldered.	from 3900 rub.
The split system blows, but does not cool well. The compressor in the outdoor unit shuts down occasionally.	The outdoor unit of the air conditioner is dirty. The heat exchanger has accumulated dust, fluff from plants, plaque from the "exhaust" of vehicles. In addition, the fan becomes dirty and the rotation speed decreases. All these factors worsen the normal heat removal from the condenser; it gives off excess heat to the street air poorly. Due to this, the cooling quality of the split system is reduced. The air conditioner tries to compensate for the lack of cooling by constant operation of the motor in the external block.	The master washes and cleans the radiator. In multi-storey buildings, with difficult access to the external block, it is necessary to additionally order the service of industrial mountaineering.	from 2200 rub.
The air conditioner blows hot air when the cooling mode is on (in heated models).	The four-way changeover valve is defective. It is located in the outdoor unit and is responsible for changing the heating and cooling modes. In the event of a breakdown, the valve "jams" in heating mode.	Valve repair or replacement required. In some cases, if the heating mode is not needed, the valve is simply evaporated, and the equipment always works for cooling. This is usually done to reduce the cost of repairs or in the absence of spare parts (valve).	from 3500 rub.
Blowing with air at room temperature. The compressor is silent or turns off immediately after starting the air conditioner.	Defective compressor(in the external block) . The main breakdowns are jamming, breakdown of the windings, interturn motor short circuit or open circuit.	Compressor replacement required. In the case of a wedge, repair is sometimes possible (can be wedged). In some cases, it is more expedient to completely replace the external unit with a new one.	from 4200 rub.
	Defective starting and / or working capacitor(in the external block). A start capacitor is required for the initial start-up of the compressor motor. Worker - keeps the engine running and increases efficiency. With a loss of the nominal capacitance of the capacitor, discharge, breakdown, the motor may not start or turn off shortly after starting.	Replacement of a defective capacitor with a new one is required.	from 1300 rub.
	Compressor thermostat breakage(in the outdoor unit), which is responsible for the thermal protection of the motor. As a result, the compressor is not powered and will not start.	It is necessary to replace the thermostat with a new one.	from 1500 rub.
It blows cold, but does not cool well. The split system turns on for a short time and turns off quickly when the room temperature is high and the minimum operating temperature. cooling. Modern models give out an error code.	Defective temperature sensor or thermistor. He "monitors" the temperature in the room and is located in the indoor unit. In the event of a failure, it can "read" underestimated values, which is why the cooling is turned off ahead of time.	It is necessary to replace faulty sensors with new ones.	from 1400 rubles.
	Defective evaporator or condenser temperature sensors. According to their indicators, the pressure in the system is regulated for different cooling modes. If any of the sensors erroneously signals that the required cooling parameters have already been achieved, then the air conditioner turns off ahead of time, without cooling the room to the required temperature.	It is necessary to replace faulty sensors with new ones.	from 1400 rubles.
It blows, but the cooling is weak. The compressor in the outdoor unit can work without stopping and turn off by a thermal relay due to overheating.	The outdoor fan is defective. Most often, the engine burns due to the ingress of dust. This leads to poor heat removal from the condenser and low cooling capacity; the air conditioner tries to compensate for its lack by constant operation of the compressor. This leads to overheating of the motor, and it is turned off by a thermal relay.	A complete replacement of the fan or only its motor is required (if spare parts for the fans are sold separately).	from 1700 rub.
When the air conditioner is turned on, it blows warm air.	Lost communication between blocks. As a result, the external one does not work. Without freon circulation, the indoor unit turns into a ventilation device and "drives" the air without cooling. Communication disappears more often in outdated models. Modern ones immediately signal with an error code if the connection fails and will not work.	Restore the power supply to the external unit (usually wiring, contact connections).	from 1500 rub.
	The control board in the indoor unit is defective. The reason may be a jammed, punctured or burnt element that starts the compressor or fan of the outdoor unit. For example, power relays, amplifier microcircuits. In addition, the microprocessor can be damaged.	Repair or replacement of the control module is required. The relay can be stripped if the contacts are stuck. Damaged elements are soldered and replaced with new ones. In case of severe damage to the unit, especially due to burnt out microcircuits, failure of the microprocessor, a complete replacement of the control module is required.	from 1800 rub.
	Inverter module defective(in the external block). It is present only in an inverter air conditioner and is responsible for powering the compressor. In the event of a module breakdown, the current is not supplied to the compressor.	It is necessary to replace the faulty module with a new one.	from 2300 rub.

* The cost is indicated ONLY for the work of the master... Spare parts and additional services are calculated separately and included in the total invoice.

In addition to basic faults, there are others. To determine exactly what kind of breakdown has occurred, the air conditioner is diagnosed. Based on its results, the master determines the volume of repairs and names the full cost of the service.

Did you find that the air conditioner turns on, but does not cool well or does not cool the air in the room at all? Have you tried to troubleshoot a problem but the situation hasn't changed? Contact us for professional help!

Call the "RemBytTech" service center:

The technician will diagnose and repair the air conditioner at home. You choose the day and time of the repair yourself.

After repair we provide a guarantee for spare parts and work performed. The warranty card is valid for up to 2 years (depending on the problem resolved).

Air conditioning devices are installed in order to create comfortable conditions in the room. Their main task is to cool the air. The heating function has long been considered secondary. But today leading manufacturers have changed their approach to this issue. It turned out that the heating mode can be very useful when the cold weather sets in, before the central heating is turned on. But sometimes situations arise when the system starts to work incorrectly. Why isn't the air conditioner blowing warm air? The reason may be incorrect operation or breakdown of one of the elements of the cooling structure.

Heating air

In order to find out why the air conditioner does not work properly, you should understand how it heats up the air masses. After all, initially, the cooling mode was considered the main function. It turns out that the design of individual mobile systems includes ceramic heating elements. In this case, their operation is similar to that of a conventional heater. The disadvantage of such devices is the high consumption of electrical energy.

Modern models use a different operating principle when heating air. The coolant inside the structure changes the direction of circulation. Condenser and evaporative element change their roles. The air conditioner starts to cool the external air masses. In this case, warm air enters the room.

Cooling unit operation at low temperatures, possible consequences

If the air conditioner does not blow warm air, you should figure out whether it is capable of operating in this mode. Not all structures can heat the air in the room with the onset of winter frosts. Standard cooling systems operate in heating mode only up to a certain negative temperature. Typically this value should not exceed -5 ° C.

When using such devices at lower temperatures, the likelihood of problems increases significantly:

the oil in the compressor becomes more viscous;
the cooling substance changes its properties;
dry start of the compressor can lead to its breakdown;
operation in extreme mode leads to rapid wear of parts and failure of the entire system.

An ice crust sometimes appears on the surface of the heat exchanger with frost. It melts periodically. The water flows into the sump. Ice forms in it. This could damage the fan. In addition, ice deforms the walls of the heat exchanger, leading to depressurization and leakage of the working substance.

Since heat enters the room from the external environment, when the temperature drops, working conditions become more difficult. The air conditioner needs more energy to heat the air. When certain limits are reached, it can simply turn off and stop working.

Typically, the technical characteristics of the device indicate the temperature range in which its optimal functioning is possible. These parameters should be taken into account and the technique should not be used in an extreme mode.

Reasons for system malfunction in heat transfer mode, solutions to the problem

The following reasons may arise for the poor-quality operation of the cooling device in the heat transfer mode:

ice plugs appeared in the connecting pipes. They impede the movement of the working substance. Defrosting is not possible during the winter period. You cannot heat the main line. To solve the problem, switch modes of operation. This changes the direction of movement of the coolant. The external module heats up;
there is not enough freon in the air conditioner. This situation can arise in the event of a leakage and leakage of a gaseous substance. The wizard is invited to troubleshoot the problem. After finding problem areas, he closes them up and refills the system to the desired level;
dirt appears on the surface of internal parts. It is necessary to periodically remove the decorative cover of the device and clean the main elements and filters;
breakage of certain parts of the structure may occur. Usually, in this case, a malfunction code appears on the control panel. To restore the operation of the cooling unit, a service technician is called.

Sometimes, immediately after turning on the device, it turns out that it does not work in heating mode. How to make the air conditioner blow warm? Don't panic right away. Such a mode of operation is associated with a change in the direction of movement of the coolant. This takes some time. Also, if there is a negative temperature outside, the compressor should pick up speed. You have to be patient and wait.

Using inverter designs

As mentioned above, classic air conditioning devices are not well suited to operate in heating mode at low negative temperatures. Their efficiency decreases, heat losses increase. The risk of compressor breakdown increases.

Inverter models can be more efficiently used to heat a room, even in fairly severe frosts. There is a way to increase work efficiency. The flow of external air masses mixes with the air in the room. In heating mode, it is necessary to compensate for the smaller temperature difference.

To improve the operation of air conditioners in winter, winter sets of equipment can be used. They consist of the following elements:

devices for heating the drain system and external connecting pipes;
Heating elements heating the fan and compressor;
a device for automatically adjusting the engine speed when the temperature parameters change.

Installing the winter kit allows you to prevent damage to the outdoor unit when it is turned on in borderline conditions and prevents the formation of ice in the drain pipe.

Should I use an air conditioner to heat the room?

The use of a cooling structure for space heating has a number of advantages:

a sufficient amount of moisture remains in the air;
no carbon dioxide is emitted;
heat output is greater than the amount of consumed electrical energy;
microclimatic conditions in the room are improved.

But along with the merits, there are certain negative aspects:

the service life of the air conditioner is significantly reduced;
the oil thickens faster, its characteristics deteriorate;
The efficiency of the device becomes less than the nominal value;
the risk of failure of the cooling device increases.

Heat transfer from air conditioning equipment turns out to be quite high and economically justified. Modern models are capable of operating at low negative temperatures. But they are only an addition to the main heating system.

The most common problems when using a car air conditioner are named. There are also examples of what the consequences are and how to avoid such situations. At the end of the article, a video review of self-cleaning the air conditioner.

It is almost impossible to imagine a modern car without air conditioning or climate control, although some brands still save on this. According to reliable data from SEAT researchers, driving without an air conditioner significantly reduces driver alertness than at a comfortable temperature of 25 degrees Celsius. Some experts compare the condition with alcohol intoxication, which over time only worsens the health of the driver and passengers.

An equally important point of the correct use of the air conditioner, since this affects not only the health of the driver and passengers, but also the air conditioning system itself. The most common and most common mistake of using the air conditioner with open windows and doors. The reason for this is simple, many people think that by opening the window, more fresh air will enter the cabin or thereby create a comfortable temperature. As trite as it sounds, SEAT specialists have found many such drivers who have no idea that it is possible to regulate the temperature without opening windows or doors.

The consequences of such a situation are the most commonplace, firstly, you can get a cold in a couple of minutes, and secondly, there is no fuel saving at all, since the air conditioning compressor is constantly in operation, and this will sooner or later lead to becoming unusable. Thus, it is worth understanding the principle of operation of a car air conditioner, and what factors affect its operation.

The second common mistake when using is turning on the air conditioner at full power after getting into a hot car. According to SEAT engineers, turning on the air conditioner in this state, you will not get the desired effect, since it will simply drive hot air through the cabin. In addition, the load on the air conditioner evaporator is maximum.

In this case, it is recommended to open all doors or windows for a few minutes in order to let in cool air (in the hottest weather, the air in a standing closed car is hotter than outside). Only after that close all windows and doors and turn on the air conditioner for cooling.

Disabling air recirculation in the car, in this rating it is given the third place. The situation is quite two-faced, as there are air-conditioned cars with an auto function. In this case, the system will independently decide how much to close or open the damper to maintain a certain temperature in the cabin.

Another mistake drivers make during cold weather. There are situations when the outside temperature is lower than the temperature in the cabin. In this case, it is easier for the driver to turn on the air conditioner, although it would be more correct to open the window. In this way, you will not only save fuel, but also there will be less load on the car engine itself.

Not only do newbies make mistakes with air conditioners, experienced drivers also make similar mistakes. An example of this is the 5th mistake, when, after turning on the air conditioner, the air flow is directed to the face of the passengers. It is very easy to get sick in such a situation, especially if you have been in the sun before.

For better air circulation and quick cooling of the passenger compartment, it is recommended to direct the cold air flow from the air conditioner upwards. According to the rules of physics, cold air will descend, thereby mixing with warm air and faster, regularly cooling the cabin.

The last mistake most often made by owners of air-conditioned cars is untimely maintenance of the system and replacement of filters. According to the rules, air conditioner filters are replaced every 15-20 thousand kilometers of the distance traveled. Similarly, do not leave aside the situation when the air conditioner has become poorly cooled or does not provide cold air at all.

It is worth remembering that depressurization of the car air conditioning system can lead to significant damage, especially in the case of high ambient humidity. Most often, the compressor fails, and the price of a new one often starts from 300-400 euros. No need to be lazy to go to the service to check the air conditioner, thereby saving yourself from subsequent problems and financial waste.

Video review of self-cleaning a car air conditioner:

When you turn on the air conditioner in your car, you expect to feel a breath of cool fresh air. However, this does not always happen. If there are some problems (major and minor), your car's air conditioner will not blow cold air.

Potential Causes of the Air Conditioner Blowing Warm Air

As already mentioned, the reasons for the lack of cold air can be different. Here is some of them:

Lack of refrigerant. With a lack of refrigerant, the air conditioning system does not work (the clutch does not turn on, and the compressor does not work). In fact, this is the most common problem with a lack of cold air supply. A lack of refrigerant in the system can be caused by a number of reasons, for example, leaks in the system circuit or malfunctioning of its components.
A / C clutch switch malfunction. If the clutch switch is defective, the compressor solenoid valve will not operate. This means that no refrigerant is being charged and the system is not working.
Damage or contamination of the radiator of the air conditioner. The radiator is where the magical transformation of the refrigerant takes place. If the radiator is dirty or damaged, then you will not be able to enjoy not only cold, but even slightly cool air.
Plugging of highways. What happens if you pinch a garden hose? Water won't flow, will it? The same is true for the air conditioning system. If there is an obstruction in the system, it blocks the circulation of the refrigerant and the air conditioner does not blow cold air.

Although several possible causes of system malfunction have been described above, the most common is a lack of refrigerant. The amount of refrigerant in the air conditioning system naturally decreases over time, but this happens very slowly. However, the system may leak. If your car's air conditioner is not blowing cold air, you need to run system diagnostics. It must be carried out by a specialist certified to work with heating, ventilation and air conditioning systems.