Why air conditioning cools badly

Any climate system is designed to cool the interior of buildings in the summer heat, but the service centers of such equipment often receive calls from users with the same question: why does the air conditioner not cool? There are many reasons for the violation of the proper operation of the split-system, but in this case there are no more than a dozen of them, and we will try to describe each in detail.

How to determine the health of the split-system

An important criterion for the proper operation of climate control systems is the temperature of the air flow at the outlet of the evaporator unit, which is within 6-14 degrees for non-inverter-class models. The exact value depends on the temperature of the outdoor and indoor air, the degree of clogging of the grids of the system modules. Inverter class air conditioners first give the same temperature parameters, and when the air in the room cools down, gradually raise them to 12-18 degrees.

This parameter also depends on the manufacturer: in European and Japanese split-systems, temperature readings are higher than in similar equipment from Asia and China.

However, this temperature does not always meet the stated criteria. What is the reason for this phenomenon - consider below.

Possible causes of the problem

Climate equipment service technicians, based on rich practice, have compiled a registry of the main reasons why air conditioning cools poorly.

Air filter clogging

If a serviceable split system starts to pump warm air into the apartment, then this is the first signal to the user that it is necessary clean the filters of the indoor unit. Delay will lead to the breakdown of expensive equipment. Taking heat from the room, the evaporator fan works like a vacuum cleaner, and sucks up all the dust inside the unit, which accumulates on the filters and its horizontal blades. There is a gradual clogging, causing the air conditioner to blow warm air.

Many modern models of split-systems independently notify the user about the need to clean the filters, displaying an error code on the display.

It is quite simple to clean the grate - carefully remove it and rinse sediment under running water, after drying, install it in the same place.

Outdoor unit grill clogged

The remote module works in even more unfavorable conditions: dust, poplar fluff, smog from motor vehicles together with raindrops clogs the protective grid, forming a very dense film that prevents fresh air from entering.

Peel off the screen You can use your own chemicals or order special services at home.

The evaporator fan is clogged with dust.

In this case, you will have to disassemble the internal unit in order to free up sufficient access to the blades of the device.You can clean them with an ordinary clothes brush or use a high-pressure washer, but then you need to invite a professional.

Not enough refrigerant

Modern climate systems use freon for coolingwhich belongs to volatile gases and can be evaporated during use. In addition, seal failure and gas leakage may occur. Freon volume change could occur during transportation and subsequent installation, or the system was not completely filled at the factory due to automation failure.

Detect point leakage, localize and eliminate the defect is possible only with the use of special equipment. Invite a specialist from the service center of your model, he will quickly deal with the malfunction and refuel your split-system with a refrigerant.

The evaporator or remote fan does not work.

The reasons for this behavior are different:

• the block grid is packed with various deposits;
• start capacitor failure;
• engine failed;
• incorrect operation of the control board;
• wear of bearings and other parts.

These problems lead to the fact that the air conditioner does not cool, and the fan blows on the surrounding warm air.To eliminate them, you need to disassemble the unit (except for the first option), so it’s best to invite an experienced master who quickly finds the cause and removes it qualitatively. Wines may be intermodular connection - it is necessary to check all the wiring with the help of special equipment.

Four-way valve not working

This device is installed on the outdoor unit to switch the split system from cold to heat, when due to prolonged rains it is necessary to warm the room to remove excessive moisture. If the valve is broken, the air conditioner no longer cools the air flow, but independently switched to another mode and saturates the room with hot air.

An experienced master can repair the device, but, according to practice, it will be cheaper to simply replace it.

Incorrect compressor operation

It can simply jam or break the winding on the case, an internal break, break the start capacitor or the temperature relay. Without the high-quality operation of this important device, the entire system will not fulfill its purpose, so the air conditioner does not cool the air. Capacitor and relay it is possible to replace, but if the compressor is jammed, then the entire unit must be changed or only it, but this important part of the system cannot be restored.

Sensor failure

On any model installed temperature and pressure regulators. The main cause of failure can be a short circuit, or their resistance is not equal to the set value, therefore the board controlling all processes does not give a signal to start the compressor.

If at least one of the sensors is broken, then the protection system is immediately activated - the electronics turn off the cooling. To determine the good condition of these important parts can only be a trained specialist with sufficient experience and relevant equipment for diagnostics.

Capillary tube blockage

The climate system can never work if this small device is clogged with moisture, because it plays the same role as the capillary system of our body. The air conditioner may stop pumping air into the room altogether, so carry out the evacuation - special cleaning or urgently solder a new tube.

Vacuuming of the Mitsubishi conditioner

Not enough power

If you are at the time of purchase incorrectly calculated power the climate system, in hot weather, especially when the windows of an apartment overlook the sunny side, the heat flow increases significantly and the equipment cannot cope with it. Close the window blinds, do not open the vents to reduce the influx of heat from the outside. If after that the air conditioner cools badly, and then turns off completely - disconnect the equipment from the network and call the wizard.

We tried to list all the main reasons for incorrect operation of air conditioning systems and methods for their quick elimination, but all our recommendations will be correct if you have correctly selected the device power for your room. If these methods are not crowned with success and coolness is negligible, then you need to purchase a more powerful system or install an additional air conditioner of similar capacity, since yours was not properly selected.