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Why does warm air come out of the split system? The air conditioner does not cool. Potential Causes of Your Air Conditioner Blowing Warm Air

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

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

We have prepared an article about the reasons why the air conditioner is blowing but not cooling the air to help you understand the situation and decide whether you need to call a repairman.

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

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

• Operating time of climate control equipment. Customers often forget that when the air conditioner turns on, it does not instantly cool the air in the room. It takes 10, 15, 20 minutes to noticeably lower the temperature. Depending on the size of the room, the temperature outside and inside and the power of the split system.
• Correspondence of the power of the split system 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 warm. When choosing equipment, it is often overlooked that the load can be peak, and the air conditioner must be taken with a reserve of “strength”.
• Isolation of the room. The air conditioner in the apartment will not cool well if there are “holes in the tightness” of the room: open windows, doors, working ventilation system. Additional heat inflow 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, and 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 air temperature at the air conditioner inlet and outlet.

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 the stream from the outside or by slightly pushing the thermometer inside through the blinds.

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

For a working air conditioner, the temperature difference at the “input-output” is within 7-15 degrees. If you just turned on the air conditioner to maximum cooling, and the difference is less than these values, it means that your split system does not cool well due to some internal reasons.

In addition, you can check the outlet temperature of the flow with the passport values. Typically, 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 produce 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 rated temperature, then you should look for a problem inside the air conditioner.

The air conditioner blows warm air, what problems can you fix yourself?

You can deal with some of the reasons for poor cooling yourself. The table contains the main ones and provides recommendations for troubleshooting equipment malfunctions.

If eliminating these problems does not improve the situation and the cooling is still weak or absent, then the problem is in the components and parts of the climate control equipment. In this case, a complete diagnosis by a specialist and service repair are required.

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

The symptoms of malfunctions are similar, but they occur due to wear or malfunction of parts, damage, internal contamination of components and mechanisms. Based on their experience in repairing air conditioners, RemBytTech technicians have compiled a list of major equipment breakdowns.

* The price 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 the main faults, there are others. To determine exactly what kind of breakdown has occurred, the air conditioner is diagnosed. Based on its results, the technician determines the scope of repairs and names the full cost of the service.

Have you found that the air conditioner turns on, but does not cool the air well or does not cool the air in the room at all? Have you tried to fix the problem, but the situation has not 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 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 fault repaired).

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

Potential Causes of Your Air Conditioner Blowing Warm Air

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

• Lack of refrigerant. If there is a lack of refrigerant, the air conditioning system does not work (the clutch does not engage and the compressor does not work). In fact, this is the most common problem of lack of cold air supply. A lack of refrigerant in the system can be caused by a number of reasons, such as leaks in the system circuit or faulty components.
• The air conditioner clutch switch is faulty. If the clutch switch is faulty, then solenoid valve the compressor does not work. This means that no refrigerant is pressurized and the system does not operate.
• Damage or contamination of the air conditioner radiator. The radiator is where the magical transformation of coolant happens. If the radiator is dirty or damaged, then you will not be able to enjoy not only cold, but even slightly cool air.
• Clogging of highways. What happens if you pinch a garden hose? The water won't flow, will it? The same is true for the air conditioning system. If there is a problem in the system, it will block the refrigerant from circulating and the air conditioner will not blow cool air.

Although several are described above possible reasons system malfunction, the most common being 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 develop leaks. If your car's air conditioner is not blowing cool air, you need to diagnose the system. It should be performed by a professional certified to work on heating, ventilation and air conditioning systems.

When the air conditioner blows warm air instead of an invigorating cold stream, it means you need to look for a problem. This may be due to various reasons, which a specialist will help identify.

We determine the causes of the breakdown

In models operating in cooling and heating modes, the switch can be set to “warm”, then, regardless of the temperature outside the window, the air conditioner will heat the air. For the system to start cooling it, just switch the mode on the remote control or case.

Warm air may be the result of heat exchanger malfunctions. This is usually due to a freon leak, which leads to a drop in pressure. The gas is not cooled properly, so heat exchange does not occur. In order for the air conditioner to start working for cooling, you need to call a specialist who will perform high-quality air conditioner maintenance.

Another possible reason is contamination of the heat exchanger or filters. If they are not cleaned for several months, the efficiency of the equipment is significantly reduced, the cooling process is disrupted and the compressor fails. Therefore, it is very important to carry out regular maintenance and thoroughly clean the filters.

Split-S specialists will provide comprehensive services very quickly and efficiently climate systems.

What to do if warm air comes out of the air conditioner:

• Check the operating mode on the remote control; if the mode is set to HEAT “warm”, switch it to COOL “cold”. If you cannot switch modes using the remote control, you need to replace the batteries in it;
• in inexpensive models, the lower temperature limit can be +18 degrees. If on a hot day the temperature in the shade is lower, the device will automatically start operating in ventilation mode, and warm air will flow from the indoor unit;
• when a new air conditioner has not been used for a long time, and after turning on it supplies warm air, this indicates a freon leak. It is possible that mistakes were made during installation, so you must immediately call the experts.
• If outdoor unit If it is heavily polluted or foreign objects have got into it, then due to impaired air circulation it will overheat greatly. As a result, heated air will come out of the outdoor unit. It is necessary to call specialists and carry out everything necessary procedures clearing blocks.

Contact the Split-S company

Young drivers may no longer know what it’s like to drive in the summer heat in a car without air conditioning. Previously, a cooler in a car was a luxury item, but today it is even included in the basic configuration of many inexpensive models. But any breakdown of the air conditioner, and in terms of comfort we roll back 20-30 years. Like other car components, the air conditioner, according to the law of meanness, fails exactly when it is needed most - in the heat. We found five reasons why the air conditioner blows into the cabin warm air.

1. Not enough refrigerant

This is the undoubted leader in the number of problems with air conditioning. Does it cool poorly or doesn't work at all? The first thing you need to do is check freon level. Alas, you won’t be able to do this on your own, without special equipment, however, sensing the demand for such services, car air conditioning service workshops began to open everywhere. Why are there workshops, sometimes a compact refueling device is purchased and services are provided on roadsides and parking lots. What we mean is that finding a place to check and refill with freon is not difficult. The only exception is very old cars that are designed for R12 freon; a workshop that works with it is not easy to find today, but equipment for R134 is everywhere, you can check the level and refuel without problems. Such a service costs 1000-2000 rubles.

Another question is where the old refrigerant went. If the last time the air conditioner had to be refilled was more than two years ago, then most likely no additional reasons It's not worth looking for. This is either natural evaporation or a leak so microscopic that no one will ever find it. Another thing is if there is not enough refilling even for a year, then there is definitely a “hole” somewhere in the system. This is determined at the service; freon with additives that glow in ultraviolet light is poured into the system. Then you just need to look at the engine compartment with a special “flashlight” to understand where the “siphonitis” comes from, and then, based on the diagnostic results, either weld it (argon welding is needed) or change the tubes.

2. Poor condenser cooling

Anyone who is at least general outline imagines the operation of a car air conditioner (and not only cars, the operating principle of all cooling devices is the same), understands that without freon cooling there will be no coolness in the cabin. In a car, cooling occurs in a condenser, which in slang is usually called a radiator. It is located in front of the main radiator and is the first to meet the flow of incoming air, which helps the standard fan cool the freon.

There are two reasons why cooling will be insufficient. Either there is some problem with the fan, or the condenser is clogged. As with any electrical device, possible problems with a fan a lot. These include motor failure, wiring problems, insufficient voltage, lack of ground, and a blown fuse - in general, the diagnostician has a lot to turn around. True, the fan itself easily detects itself. When the air conditioning compressor starts operating, the fan must turn on at the so-called first speed. If this does not happen, then you don’t have to look further, until the fan does not work, the air conditioning system is useless. And then either go to an auto electrician, or arm yourself with a tester and start calling everything to determine the reason. Please note that it is the first speed that is needed; the fan can, for example, turn on at the second speed, but without permanent job At first speed it won't help.

A clogged condenser is easier on one side, but not on the other. It’s simpler in the sense that you don’t need to diagnose anything, you just need to take it and clean it mechanically. The difficulty is that the layout of many cars is such that for this procedure you will have to disassemble half of the front end, at least remove the bumper - just sticking a Karcher hose in and blowing it out will not work, moreover, you can damage the honeycombs. But, in any case, the problem of a clogged condenser can be solved independently and without specialized equipment.

3. Compressor malfunction

If checking the level and cooling of freon did not yield anything, then it’s up to the heavy artillery - reasons that are more difficult and expensive to fix. First on this list is - compressor breakdown. It often happens that trouble does not come alone, compressors just fail due to a lack of refrigerant or its poor cooling, because they also do not work in normal mode and receive little lubrication (lubricant is added to freon, little freon means lack of lubrication) . Repairing a compressor is a thankless task; it is a rather complex device, requiring both skill and spare parts. If the compressor fails, then it makes sense to consider buying a used copy from disassembly. The compressors of most cars have a decent service life, so even a second-hand copy can last a long time, although in any case it’s a pig in a poke, which can only be checked by installing it on the car, so we are not advocating for this option to solve the problem.

In addition to the compressor itself problems may be with the electric coupling and pulley. The coupling can have electrical and mechanical damage, and repairs are usually difficult and expensive; rarely does anyone repair the coupling. The weak point in pulleys is the bearing, which can fail at any time. The saddest thing is if it gets blocked, then the drive belt almost inevitably breaks and the car owner gets a bunch of additional problems, but the creaking and grinding noise that accompanies, for example, water ingress is also a very unpleasant thing. Just the bearing in the pulley on many cars can be changed without problems, even on your own, you only need pullers and a press. You also need to be careful, if during pressing and pressing the pulley is slightly damaged or bent, then such a compressor will no longer work.

4. Damage to wiring

Disruption of electrical circuits is a banal breakdown, but very nasty, and most importantly, no one is immune from it. There are many electrical components in the air conditioning system, each has wiring, plus control pressure sensors; without their correct readings, you can’t expect coolness in the cabin either. Traditional diagnostic problem electrical breakdowns– a huge number of potential diagnostic sites. As they say, keep calling and calling. Fortunately, according to reviews from air conditioning mechanics, electrical problems do not arise so often, so it is necessary to inspect half of the wires in the car only in case of great need. But this can also happen, and then repairs can be very unpredictable in terms of timing and duration.

5. Dampers and heater controls

Formally, this reason does not apply to the air conditioning system, but it fully fits the conditions that we put in the title - warm air can blow from the air conditioner, provided that it is fully operational. Even in a simple, manual car stove, different flows are mixed by blocking some air channels and discovering others. In climate control systems, where everything works using servos, and even under the control of an electronic “brain,” this “labyrinth” can be very complex. AND disruptions in the system lead to unpredictable consequences.

In terms of detecting and correcting problems, electronic systems are more convenient, primarily because any, even the most ancient climate control system, has testing and self-diagnosis systems. If the climate control unit is working properly, then with a high degree of probability it will be able to tell which circuit is broken and where to look for the jammed damper. True, repairing and replacing the unit itself can cost a pretty penny.
With mechanical air conditioners, you will have to remove the dashboard, disassemble the stove and look for a broken cable or a jammed damper yourself. This procedure almost always turns out to be more time-consuming. True, you don’t need great skills for such work - just read on the Internet how to remove the dashboard and disassemble the stove on a specific car model, get around with tools and find the problem. It just takes time.

Dirty damper and gear drive. Photo — drive2

It is better not to put off repairing the air conditioning system until later. Every day in the heat is a blow to comfort, and the later you solve the problem of air at the wrong temperature from the nozzles, the longer you will have to suffer. There is no point in repairing the air conditioner by winter; if you haven’t managed to get everything done before the end of the season, it’s better to start a new round in the spring.

As for the possible causes and repair technologies, everything is the same as with other elements of the car. We consider the reasons by popularity from frequent to rare, exclude options and, using brute force, arrive at the true culprit of the breakdown. Repair or replace a spare part? Do it yourself or go to a service center? Alas, it is impossible to answer these questions unambiguously for all drivers - the input data is too different. But understanding the problem and independently diagnosing the breakdown is already half the battle on the way to returning coolness to the interior, even if you later contact service with the problem.

Air conditioning in your car, working properly, is an amazing thing. However, when it fails (which, of course, certainly happens on the hottest day of the year), it turns into a real mockery - warm, stale air begins to blow into the cabin. If your car's air conditioner is faulty, then you better not put off visiting a service center.

Automotive air conditioning systems have a rather complicated design, which makes it difficult to repair them without the presence of necessary equipment and special knowledge. In addition, the refrigerant used in the system is subject to increased environmental requirements. We have identified the 3 most common malfunctions of the air conditioning system so that you have an idea of ​​the reasons for its failure.

1.

A refrigerant leak in itself is a unique phenomenon, since when the pressure drops it instantly turns into gas. Closed systems Air conditioning systems in cars are reliably sealed and do not require refilling. If there is insufficient refrigerant in the system, it can be concluded that there is a leak that needs to be repaired.

Leaks from the air conditioning system do not lead to the formation of puddles under the car, as happens with antifreeze. And only a professional mechanic can find almost imperceptible signs of leakage, such as oil deposits on pipe connections. Refrigerant leaks can also occur in the compressor, condenser and/or evaporator, that is, in almost all elements of the system. To detect them, as well as refuel, special equipment is used, including using ultraviolet radiation, which allows you to efficiently diagnose and service your car.

2.Air conditioner wear and tear on the auto compressor.

The compressor is the heart of the air conditioning system. Its function is to circulate refrigerant to effectively remove heat from the passenger compartment. Like many other automotive parts, the air conditioning compressor wears out over time. Due to the complexity of the design, the compressor may fail if contaminants enter it or if other elements of the system break down.

How to extend the life of a car air conditioning compressor.

There are several ways to extend the life of your air conditioning compressor. First of all, at least once a month, turn on the compressor for about 10 minutes (even in the cold season), regardless of the ambient temperature. This is very simple operation, since in most modern cars it is turned on together with the heater. Another way is to constantly diagnose the air conditioning system, which should be performed by professionals.

3. Air conditioner electrical system malfunction.

The air conditioning system includes many electrical wires, fuses, relays and pressure regulators, the coordinated operation of which ensures safe and efficient work air conditioner If any of these elements fail due to wear or defect, the entire system is automatically shut down for safety reasons. Without special equipment and, more importantly, necessary knowledge and experience, diagnosing these problems is very difficult.