When the air conditioner is turned on, hot air blows. The air conditioner blows warm air - a solution to the problem
When warm air blows from the air conditioner instead of an invigorating cold stream, then you need to look for a malfunction. This may be due to various reasons, which a specialist will help to identify.
Determine the causes of failure
In models operating in cooling and heating modes, the switch can be set to “heat”, then regardless of the temperature outside the window, the air conditioner will heat the air. In order for the system to start cooling it, it is enough to switch the mode on the remote control or case.
Warm air can be the result of a malfunction in the heat exchanger. This is usually due to a freon leak, which leads to a pressure drop. The gas is not cooled properly, so no heat exchange takes place. In order for the air conditioner to start working for cooling, you need to call a specialist who will perform high-quality maintenance of the air conditioner.
Another possible cause 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, thoroughly clean the filters.
The specialists of the Split-S company will very quickly and efficiently perform comprehensive maintenance of climate systems.
What to do if warm air comes out of the air conditioner:
- check the operation mode on the remote control, if the HEAT mode is set to “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 the temperature in the shade is lower on a hot day, the device will automatically start working in ventilation mode, and warm air will come out of the indoor unit;
- when a new air conditioner has not been used for a long time, and after turning it on, it supplies warm air, this indicates a freon leak. Perhaps mistakes were made during installation, so you should immediately call the masters.
- If the outdoor unit is heavily soiled or foreign objects have fallen into it, it will overheat due to impaired air circulation. As a result, heated air will flow out of the outdoor unit. It is necessary to call specialists and carry out all the necessary cleaning procedures for the blocks.
Contact the company "Split-S"
Air conditioning in your car working properly is an amazing thing. However, when it fails (which, of course, happens without fail 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'd better not put off a visit to the service shop.
Automotive air conditioning systems have a rather complicated design, which predetermines the complexity of their repair without the 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 air conditioning system malfunctions so that you have an idea of the reasons for its failure.
1.
A refrigerant leak is a unique phenomenon in itself, because when the pressure drops, it instantly turns into a gas. Closed air conditioning systems in cars are reliably sealed and do not require refueling. If there is not enough 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 bottom of the car, as happens with antifreeze. And only a professional mechanic is able to find almost imperceptible signs of leakage, such as oil deposits on tube connections. Refrigerant leakage 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 refueling, special equipment is used, including those using ultraviolet radiation, which allows you to diagnose and service your car with high quality.
2. Air conditioner compressor wear auto.
The compressor is the heart of the air conditioning system. Its function is to circulate the refrigerant to effectively remove heat from the passenger compartment. Like many other automotive parts, the A/C 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 prolong the life of your air conditioner compressor.
There are several ways to extend the life of an air conditioner 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 a very simple operation, since in most modern cars it is turned on together with the heater. Another way is the constant diagnosis of the air conditioning system, which should be carried out by professionals.
3. Air conditioning electrical system malfunction.
The air conditioning system includes many electrical wires, fuses, switches and pressure regulators, the coordinated work of which ensures the safe and efficient operation of the air conditioner. In case of failure of any of these elements due to wear or defect, automatic shutdown of the entire system is provided for safety reasons. Without special equipment and, more importantly, the necessary knowledge and experience, diagnosing these problems is very difficult.
Air conditioning in a car is an option that many take for granted. In the summer in the heat, it is indispensable for ensuring comfort in the cabin. However, regardless of the brand of the car, the quality and prestige of the brand, air conditioning systems fail from time to time. And this is where the question of repair arises. There are three main causes of failure: technological, external and operational.
Types of faults
Technological breakdowns depend primarily on the quality of materials and workmanship, and may include engineering errors. This kind of damage is almost impossible to influence, as this is a manufacturer's error. The main breakdowns include violation of the tightness of the system, jamming of the compressor, refrigerant leakage and many others.
External problems include exposure to an aggressive environment. The most common reason is pollution. To prevent damage of this kind, you must follow the rules of operation. Such problems are explained by the violation of the rules for the use and maintenance of the air conditioner, as well as its natural wear and tear.
Hot air from air conditioner
The most obvious sign of a problem that a driver can notice is warm air coming in instead of cool air. Most likely, the reasons may be the failure of the condenser, the failure of the fans or the lack of refrigerant. What to do if the car air conditioner blows warm air?
First you need to check the performance of the condenser, in the auto-conditioning system it is designed to cool the air. The condenser is located in front of the machine, so over time various foreign objects can accumulate there, for example, bags, candy wrappers and leaves. Just by inspecting this part of the car, and removing excess debris, it is often possible to restore the previous operation of the air conditioner.
Sometimes the capacitor is damaged by road gravel and other hard objects. In this case, most likely, it will need to be replaced. But, fortunately, it is easy to do it yourself and it is not necessary to go to a car service, since the capacitor is attached with several bolts in front of the car.
And the condenser needs to be flushed periodically. During operation, a lot of dust accumulates in it, which also subsequently worsens its performance. For service maintenance of the air conditioner, you can use the services of the company "Horizont". There, using special equipment, everything will be done quickly and efficiently.
The air conditioner does not cool the air
Another reason why the car air conditioner does not cool the air is the lack of refrigerant. To fix this problem, you need to check the amount of freon and, if necessary, fill it to the required level. With the constant operation of the air conditioner, approximately ten percent of the refrigerant leaks out in a year. Therefore, refueling the system should be regular. But first of all, you need to check if the system is tight and if there is a leak in it. If there is, it must be eliminated by replacing all hoses and fittings (tips) with new ones.
The air conditioner is idling
If, after checking the condenser and freon level, the car air conditioner works, but does not cool, most likely the fan is the problem. The auto-conditioning system works due to the uninterrupted blowing of the condenser. But, like any other part, over time, the fan fails. Faults can be detected by a simple visual inspection.
There are many problems, and not all of them can be diagnosed and fixed on your own. Therefore, experts recommend regularly undergoing preventive examinations in a specialized center, for example, in one such as Gorizont LLC. There, highly qualified personnel will check the level of freon and oil, carry out a complete cleaning of the system, including the condenser, and if a fan malfunction is detected, they will carry out a quality repair of the unit.
Although modern models of air conditioners and split systems provide for a heating mode, most users still use equipment only in the cold in summer. Therefore, the equipment has a downtime period. But then the hot time began, you turned on the air conditioner after the winter and found that:
- split system does not cool, but blows warm air;
- the air conditioner started up, worked and stopped cooling, now the air conditioner blows heat, and the temperature in the room does not drop.
We have prepared an article about the reasons why the air conditioner blows, but does not cool the air, to help you understand the situation and decide whether to call the master.
Is the air conditioner really cold? 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:
- Hours of operation of climate control equipment. Customers often forget that when an air conditioner is turned 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 with external parameters. A low-power air conditioner naturally cannot 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 margin of “strength”.
- Room isolation. The air conditioner in the apartment will not cool well if there are “holes in the tightness” of the room: open windows, doors, a working ventilation system. An additional influx of heat from the outside or a 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 is 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 inlet to the air conditioner and at the outlet.
The inlet temperature is measured at the air intake grilles. Put the thermometer on the body or hold it in your hand. The output is measured in the jet from the outside or by slightly pushing the thermometer inward through the blinds.
Attention! Do not push the thermometer deep into the case. It can get caught in the fan blades.
In a serviceable air conditioner, the temperature difference at the “input-output” 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 temperature of the flow with the nameplate values. Usually, the equipment passport indicates the outlet cooling mode temperature, for example, 6-14 ° C for non-inverter systems. When turned on, inverters give 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 stream exceeds the passport, then you should look for a problem inside the air conditioner.
The air conditioner blows warm air, what problems can be fixed by yourself
You can deal with some of the reasons for poor cooling yourself. The table summarizes the main ones, and gives recommendations for troubleshooting 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 choose the minimum. And then switch to a comfortable one. | Adjust the cooling mode. |
| The air conditioner turns on but does not cool. | Fan mode selected. And the air just circulates without cooling. | Select cooling mode. |
| The air conditioner blows heat (for models with heating mode) | Heating mode on by mistake. | Set the cooling mode. |
| Cooling is weak. May leak and/or frost over the indoor unit of the air conditioner. | (coarse and fine cleaning). Dust, wool, hair clog the filters and settle on the heat exchanger plates. Because of this, the heat removal from the evaporator worsens: the radiator does not release cold well into the air, which leads to poor cooling. If the indoor unit is very dirty, the evaporator tubes may freeze up. Dust can also clog the drain hose, causing condensate to remain in the sump and then drip from the indoor unit. |
Clean filters. To get them, open the cover of the block. How to do this is described in the instructions. Then take out the filters and rinse well under running cold water and reinstall the clean ones. Attention! Do not use hot water, the filters may be deformed.If you yourself are afraid to "climb" into the indoor unit of the air conditioner, call the master. |
| Poor cooling, the compressor in the outdoor unit stops. | The radiator of the outdoor unit is dirty. Dust, fluff from plants, plaque from the "exhaust" of vehicles have accumulated on the heat exchanger, the rotation of the fan may be difficult. All this impairs the heat exchange of the condenser with the environment and reduces the cooling capacity of the air conditioner. In addition, the compressor may turn off 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. |
| Blows warm air. 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 shutdown of the motor by a thermal relay. |
Install a voltage monitoring relay. It can be placed separately or paired with a stabilizer. |
If the elimination of these problems did not improve the situation and cooling is still weak or absent, then the problem is in the components and parts of the climate equipment. In this case, a full diagnosis by a specialist and service repair is required.
The air conditioner in the apartment does not cool - reasons that require professional maintenance or repair
Symptoms of malfunctions are similar, but they occur due to wear or malfunction of parts, damage, internal contamination of components and mechanisms. Based on the experience of repairing air conditioners, the RemBytTech masters compiled a list of the main equipment breakdowns.
| sign | Possible reason | Repair or replacement | Price* (only work) |
| The air conditioner blows weakly and does not cool well. Water may drip from the indoor unit and the evaporator tubes may freeze. |
Clogged indoor unit filters(coarse and fine cleaning). Dust, wool, hair clog the filters and settle on the heat exchanger. The heat removal from the evaporator deteriorates, and the radiator does not transfer cold well to the air flow passing through it. In addition, severe contamination of the indoor unit may prevent the rotation of the fan and cause frosting of the evaporator tubes. When the drain hose is clogged, condensate remains in the sump and then flows out of the indoor unit. |
The filters are cleaned after removal. When 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 refrigerant per year can evaporate. Therefore, climate equipment requires annual maintenance (cleaning, refueling). | Freon is being recharged. | from 2300 rub. |
| 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 an error indication, a low pressure message appears. |
Freon has leaked from the system. At first, with a small amount of leakage, the air conditioning compressor located in the outdoor unit is less and less turned off for rest, despite poor cooling. Then, as the refrigerant evaporates from the system, the equipment begins to blow warm air at room temperature, and the motor stops and does not turn on. Typically, leakage occurs due to flaring of the joints of the interblock pipes or the destruction of the installation seams. |
The technician is looking for a refrigerant leak. Then it seals the leak, evacuates the system (to remove moisture and air) and fills the system with freon. | from 3400 rub. |
| It blows normally, the compressor in the outdoor unit almost does not turn off, but the air conditioner does not cool at all or the cooling is weak. The air conditioner pipe up to the evaporator can also freeze up. |
Clogged capillary piping. Due to a clogged capillary tube, the pressure drop at the inlet and outlet of the capillary increases, so part of the freon boils and gives off cold even before the air conditioner evaporator. As a result, the cooling capacity of the split system drops, and the equipment tries to compensate for its lack by the constant operation of the compressor. When the pipeline is completely blocked, 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 pushing the blockage. To remove heavy blockage, hydraulic cleaning and solvents are used. In particularly difficult cases, when it is impossible to remove the blockage, the capillary tube is unsoldered and a new one is soldered. |
from 3900 rub. |
| Split system blows but does not cool well. The compressor in the outdoor unit occasionally turns off. | The outdoor unit of the air conditioner is dirty. Dust, fluff from plants, plaque from the "exhaust" of vehicles have accumulated on the heat exchanger. In addition, the fan becomes dirty, and its rotation speed decreases. All these factors worsen the normal heat removal from the condenser, it does not give off excess heat to the outdoor air. Because of this, the quality of cooling of the split system is reduced. The air conditioner tries to compensate for the lack of cooling by the constant operation of the motor in the external unit. | The master washes and cleans the radiator. In multi-storey buildings, with difficult access to the outdoor unit, 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 models with heating). |
Faulty 4-way changeover valve. 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. | The valve needs to be repaired or replaced. In some cases, if the heating mode is not needed, the valve is simply unsoldered, and the equipment always works for cooling. Usually this is done to reduce the cost of repairs or in the absence of spare parts (valve). |
from 3500 rub. |
| Blows air at room temperature. The compressor is silent or turns off immediately after starting the air conditioner. |
Compressor defective(in outdoor unit) . The main breakdowns are jamming, breakdown of the windings, inter-turn short circuit of the engine or open circuit. | The compressor needs to be replaced. 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. |
| Faulty start and/or run capacitor(in the outdoor unit). The start capacitor is needed for the initial start of the compressor motor. Working - keeps the engine in working mode and increases efficiency. In case of loss of the nominal capacity of the capacitor, discharge, breakdown, the engine may not start or turn off shortly after starting. |
The defective capacitor needs to be replaced with a new one. | from 1300 rub. | |
| Compressor thermostat failure(in the outdoor unit), which is responsible for the thermal protection of the motor. Because of this, the compressor is not supplied with power, and it does not start. | The thermostat needs to be replaced with a new one. | from 1500 rub. | |
| Blows cold, but does not cool well. The split system turns on briefly and turns off quickly when the room temperature is high and the minimum mode temperature is set. cooling. Modern models give an error code. |
Faulty 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 indicators, due to which the cooling is turned off ahead of time. | It is necessary to replace defective sensors with new ones. | from 1400 rub. |
| Faulty 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 reached, then the air conditioner turns off ahead of time, without having cooled the room to the required temperature. | |||
| It blows, but the cooling is weak. The compressor in the outdoor unit can work without stopping and turn off by a thermal switch due to overheating. | The outdoor unit fan is defective. Most often, the engine burns due to dust ingress. This leads to poor heat removal from the condenser and poor cooling capacity, which the air conditioner tries to compensate for by the constant operation of the compressor. This leads to overheating of the motor, and its shutdown by a thermal relay. | A complete replacement of the fan or only its motor is required (if fan parts are sold separately). | from 1700 rub. |
| The air conditioner blows warm air when turned on. | 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” air without cooling. Communication often disappears in outdated models. Modern ones immediately signal an error code when the connection fails and will not work. |
Restore power to the external unit (usually wiring, contact connections). | from 1500 rub. |
| Faulty control board in the indoor unit. The cause may be jammed, punctured or burnt elements that start the compressor or fan of the outdoor unit. For example, power relays, amplifying circuits. In addition, the microprocessor may fail. | The control module needs to be repaired or replaced. The relay can be cleaned 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 microcircuits, failure of the microprocessor, a complete replacement of the control module is required. |
from 1800 rub. | |
| Faulty inverter module(in the outdoor unit). It is present only in the inverter air conditioner and is responsible for powering the compressor. If the module fails, the compressor does not receive current. | The defective module must be replaced 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 bill.
In addition to the main faults, there are others. To determine exactly what kind of breakdown has occurred, an air conditioner diagnostics is carried out. Based on its results, the master determines the amount of repair and names the full cost of the service.
Have you found 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 fix the problem, but the situation has not changed? Contact us for professional help!
Call the RemBytTech service center:
The master will diagnose and repair the air conditioner at home. The day and time of the repair is up to you.
After repair, we provide a guarantee for parts and work performed. The warranty card is valid for up to 2 years (depending on the repaired malfunction).
In modern models of air conditioners and split systems, not only cooling, but also heating modes are provided. However, their main purpose, as before, is to lower the air temperature inside the room. Owners use climate technology intensively on hot summer days and after a winter period of inactivity, it is sometimes found that it stops cooling.
Below is an analysis of the most common causes of problems, which will help you decide whether you need to call the wizard or you can do it on your own.
Preliminary system diagnostics
Before looking for problems in the air conditioner units, it is worthwhile to deal with possible external causes of the appearance of warm air.
- Duration of work. Cooling the air in the room, after turning on the air conditioner, takes a certain time. This does not happen at lightning speed - for a tangible effect, it should take from 10 to 20 minutes. The time interval is determined by the initial air temperature, the temperature at the outdoor unit, the volume of the room and the power of the air conditioner.
- Correct selection of power and features of operating conditions. A low-power air conditioner cannot cope with the cooling of a spacious room that is well warmed up on a hot day. When choosing, you should not look at the peak load and choose equipment with a small margin in power.
- Not isolated room. The cooling efficiency is reduced if there is an inflow of warm air from the outside through doors and windows that are not closed, or a forced outflow of cold air, for example, through a ventilation system.
- Obstacles to air circulation. Curtains, decorative items, furniture or blinds placed in the way of the air flow interfere with its circulation and prevent cooling.
The lack of cooling with sufficient power, free entry and exit, sufficient isolation of the room and exposure time is an indication for equipment diagnostics. At the first stage, you need to check the temperature of the air flow entering and leaving the air conditioner.
The temperature of the incoming flow is measured at the air intake grilles. The outlet temperature is measured by placing a thermometer between the shutters. The difference in temperature for a properly functioning air conditioner is 7-15 degrees.
To be sure, compare the received data with the figures indicated in the product passport. The manufacturer indicates the outlet temperature in the "Cooling" mode. For non-inverter systems, this is 6-140°C. Inverter systems in the cooling mode at the first stage give the same indicators, and then the indicators increase to 12-170 ° C. Non-compliance with the indicators stated in the passport is a signal for troubleshooting in air conditioning systems.
Problems that you can fix yourself
| sign | Probable Cause | Events |
|---|---|---|
| The air conditioner does not cool the room well. | Temperature set too high during initial setting. In order to speed up cooling, you should initially select the minimum temperature, and then switch to the comfort temperature. | Corrected by adjusting the cooling regime. |
| The air conditioner is not cooling. | The air conditioner operates in Fan mode. In this case, the air masses are driven through the equipment, without the involvement of the cooling subsystem. | |
| Warm air from the air conditioner with the “Heating” mode. | Heating mode turned on by mistake. | Switch to cooling mode. |
| Inefficient cooling. The presence of leakage, freezing of the indoor unit. | Clogged filters. During operation, dust particles, hair and small street debris cover the heat exchanger plates and stick around the filter system. As a result, the heat removal ability of the evaporator is violated: the radiator does not cool the air efficiently enough. When a large amount of debris accumulates in the indoor unit, ice covers the evaporator tubes. A clogged drain causes condensate to stagnate and drip from the indoor unit. | In accordance with the instructions, open the case cover. We take out the filters and carefully rinse them under running water. Reinstall well-cleaned filters. Attention! Rinse with cold or warm water only! Boiling water deforms the filters. If you are afraid to perform these manipulations on your own - call the wizard. |
| Does not cool and the operation of the compressor of the outdoor unit is inaudible. | Dirty outdoor unit radiator. Accumulated dust layers, street dirt, fluff make it difficult to rotate the fan blades. This reduces the cooling capacity due to the violation of the heat exchange of the condenser with the environment. Compressor shutdown can occur as a protective reaction to overheating. | Requires general cleaning in the outdoor unit. The best option is to use a steam generator. The effect will give a simple cleansing with sponges or brushes. When placing the outdoor unit on the upper floors, it is safer to involve a professional trained in manipulation at height. |
| Warm air comes out. The compressor of the outdoor unit constantly does not work, or comes to life for a couple of minutes and turns off again. | Insufficient voltage in the mains. At low voltage, the rotor winding overheats, and the motor is turned off by a protective thermal relay. | The problem will be solved by installing a relay that controls the voltage level. It is installed separately, or supplemented with stabilizers. |
If the above measures did not help and warm air is still coming out of the air conditioner, then a full professional diagnosis is required. It can only be performed by a service center specialist.
Problems requiring service and repair
The external manifestations of malfunctions are similar, but their cause is wear or breakage of parts, mechanical damage, and pronounced accumulations of pollution inside the unit.
| sign | Probable Cause | Events |
|---|---|---|
| Barely perceptible cooling. The presence of leakage, freezing of the indoor unit. | Clogged filters. During operation, dust particles, hair and small street debris cover the heat exchanger plates and stick around the filter system. As a result, the heat removal ability of the evaporator is violated: the radiator does not cool the air efficiently enough. The accumulation of a large amount of debris in the indoor unit leads to the formation of ice on the evaporator tubes. A clogged drain causes condensate to stagnate and drip from the indoor unit. | Removing and cleaning filters. To clean the fan and evaporator, the entire indoor unit is disassembled. |
| At the end of the winter period, with sufficient air flow, poor cooling. | Probably a low freon level. From a completely closed system, up to 7-8% of the refrigerant is lost during the year. Climatic equipment needs annual cleaning and topping up the level of freon. | Refrigerant level needs to be adjusted. |
| The power of the air flow is maintained, but without a decrease in temperature. Continuous operation of the compressor of the outdoor unit, without a noticeable decrease in the temperature of the air jet. Later, the motor starts to run non-stop and the air conditioner loses its cooling function. An error code may appear on the monitor - pressure drop. | Possible refrigerant leak. When the refrigerant level drops, the compressor of the outdoor unit stops turning off for rest. With a further decrease in the level of freon, the system produces warm air. The motor does not turn on at all. The most common causes of leakage are the weakening of the joints of the pipelines connecting the blocks and the destruction in the area of the connecting seams. | A repair specialist determines the location of a likely leak. Carries out measures to seal the leak, evacuate the system in order to eliminate air bubbles and trapped liquid. At the last stage, the equipment is charged with refrigerant. |
| The airflow rate is satisfactory, the outdoor unit compressor makes noise without interruption, but the cooling is insufficient. There may be freezing of the pipeline in the section before the evaporator. | Clogging of the capillary pipeline. As a result of capillary thrombosis, the pressure difference at the inlet and outlet of the channel increases. Which leads to partial boiling of freon, part of the cold does not reach the evaporator. The equipment tries to make up for the lost cooling capacity by continuous operation of the compressor. If the lumen of the capillary pipeline is completely blocked, there is no freon circulation and the compressor is idling - not cooling the air at all. | Partial overlap is eliminated by forcing air under pressure through the tube. To remove severe clogging, hydraulic removal or special solutions are used. In difficult cases that cannot be cleaned, the tube is cut out and a new one soldered in. |
| The system ventilates well, cools unsatisfactorily. The outdoor unit compressor sometimes turns off. | Clogged outdoor unit. Clogging of the heat exchanger, fan with dust, fluff. The equipment tries to make up for the reduced heat exchange by continuous operation of the outdoor unit motor. | The master flushes and cleans the radiator. |
| Hot air comes out of the air conditioner, despite the set cooling mode (for models equipped with heating). | Defective four-way valve. The valve located in the outdoor unit is stuck in the “heating” position. | The valve is adjusted or reinstalled. If the heating mode is not planned to be used, the valve can simply be unsoldered. After that, the equipment can only cool. |
| At the outlet, the air temperature is comparable to room temperature. The compressor switches off a few seconds after the start or does not start at all. | Outdoor unit compressor failure due to jamming, breakdown of the winding, interturn circuit or complete breakage. | When determining jamming, wedging measures are carried out. In other cases, the compressor is replaced. In some cases, it may be necessary to replace the entire outdoor unit. |
| In the event of a malfunction of the starting or running capacitors the engine does not start at all or turns off after a short period of operation. | The defective capacitor is replaced with a new one. | |
| Breakage of the thermal relay of the compressor of the outdoor unit. The relay provides thermal protection for the motor. The power supply to the compressor is blocked, so it does not start. | Thermostat replacement. | |
| Despite the high temperature in the room, the air conditioner is activated for a short time and turns off. Blows cool, poorly chilled air. On modern models, the corresponding error code may be displayed. | Breakage of the thermistor or temperature sensor. Placed in the indoor unit, the sensor is designed to control the temperature in the room. When registering underestimated data, the cooling is turned off ahead of time. | Replacing faulty sensors with new ones. |
| Damage to the condenser or evaporator temperature sensors. They provide adjustment of the system operation for various cooling modes. If the sensors fail, the system switches off before the required temperature is reached. | ||
| With normal airflow, it cools slightly. The compressor of the outdoor unit runs without shutting down until the safety thermostat trips in case of overheating. | Breakage of the fan in the outdoor unit. The most common cause is dust accumulation. The system tries to compensate for the violation of thermal transfer by continuous operation of the compressor. An overheating motor is switched off by a protective thermostat. | The motor or the entire fan is being replaced. |
| Immediately after switching on, the air conditioner produces only warm air. | Block connection interrupted. When the outdoor unit is turned off, the operation of the indoor unit resembles that of a simple ventilation device. A similar defect is more common in older models. New models usually turn off and give an error code. | Contact connections are subject to verification to restore the performance of the external unit. |
| Damage to the control board of the indoor unit. The reason is jamming, breaking through, burning out the elements that start the compressor or fan. | Defective parts are soldered and replaced. In case of significant and multiple damage, the entire control unit must be replaced. | |
| Failure of the inverter module. As a result of a breakdown, energy is not supplied to the compressor. | The failed module is replaced with a new one. |
The table lists the most common faults. To determine the type of failure, a diagnostic examination of the equipment is carried out. As a result, the master can accurately tell the volume and cost of the upcoming repair.