Causes of Air Conditioning Failure

The ever-working air conditioners have not yet been invented. Sooner or later, the air conditioning may break. And the reasons for this may be different. We suggest you consider the most likely causes of the air conditioning failure.


Pollution of internal block filters

These filters are a normal small mesh located under the front panel through which air is sucked. They are designed to keep the dust in the air and protect from it the inhabitants of the room and the radiator of the internal block. In fact, the air conditioner works like a vacuum cleaner, and filters play the role of a dust collector. To clean the filters enough to rinse them in warm water and dry for a few minutes. Removing and installing filters is no more difficult than replacing a dust bag in a vacuum cleaner (except when the internal air conditioning unit is at a high altitude). The operating manual always details how to do this. Filters are usually washed once every two to three weeks. If there is a large amount of dust or soot in the air, wash them more often, making sure they are always clean.

If the filters do not wash for a long time, the first thing that will be reduced is blowing the inner block’s radiator. As a result, the air in the room will be worse cooled. In addition, the refrigeration system will be disrupted, which can lead to the freezing of copper pipelines. In this case, when the air conditioner is turned off, the ice will begin to melt, and water will drip from the air conditioner. In the future, with highly contaminated filters, it is possible to clog the drainage system with lumps of dust, and then the water from the air conditioner will pour into a stream. In very neglected cases on the plates of the radiator grows such a layer of dirt that it can be removed only with the help of strong chemical cleaners.

Note that cleaning filters is not included in the standard warranty service and should be performed by the consumer (as well as replacing bags in a vacuum cleaner) according to the operating instructions’ requirements.


Freon leak

The second most common cause of air conditioning failure is the rationable leak of freon. Normalized leak (about 6… 8% per year) always occurs, even with the highest quality installation – this is an inevitable consequence of the connection of the inter-cable pipeline by rolling. To compensate for it, the air conditioner must be refueled every 1.5… Two years. If refueling is not carried out for more than two years, the amount of freon in the system will fall below the allowable level, and this can have the saddest consequences for the air conditioner: Freon cools the compressor, and at its lack, it is possible to overheat and jam it. And the cost of replacing the compressor is about half the cost of the new air conditioner.

You don’t have to have any special equipment to detect a leak. The first signs of a decrease in the amount of refrigerant in the system – the formation of ineia or ice on the fitting joints of the outer block (this is the place where copper tubes are connected), as well as insufficient cooling of air in the room (the temperature difference at the entrance and exit of the inner block should be about 10 degrees Celsius). In such symptoms, you should turn off the air conditioning and contact the service to fix the problem.


Air conditioning in winter

Air conditioning in winter

Another feature of household air conditioners – almost all models sold in Moscow are not adapted to work in winter, that is, the lower limit of the temperature of the outdoor air -5 degrees Celsius. The reason for this seemingly strange behavior of producers is that: first, the same air conditioners are brought to India, which is delivered to the European and Japanese markets, where winter is quite warm – the absolute minimum temperature in Tokyo is -8 degrees Celsius (World climate magazine, No.3, 1999); secondly, the installation of an all-season unit in the air conditioner, which allows the air conditioner to operate at an outdoor temperature of up to -25 degrees Celsius, increases the total cost by 150… $200, which reduces its competitiveness.

The need for air conditioning working all year round can occur in two cases. First, when it is necessary to cool the room not only in the summer but also in winter, for example, a room with a large number of heat-emitting equipment (server, computer rooms, etc.), because the cooling of such a room with the help of ince some kind ventilation will lead to an unacceptable reduction in humidity. Secondly, in the case of heating with air conditioning in winter. However, this use of air conditioning is not always justified because even being adapted to winter conditions, at the temperature of outdoor air -20 degrees Celsius, the performance (power) of the air conditioner falls three times compared to the nominal. The operation of unadapted air conditioning in the cold season primarily reduces the compressor’s working resources. In addition, when the air conditioner is included in the cooling mode, condensate (water) formed in the inner block will not flow through the drainage tube outwards because of the ice cork. As a result, half an hour after turning on, water from the inner block will pour directly into the room. Note that any split system is possible to adapt to winter conditions. To do this, it is built into the device of the compressor carter heating and the revs control of the fan of the outer block and installed “warm” drainage.

All of the above applies, first of all, to split systems, but this is true for window air conditioners. The main difference is in the absence of window air conditioners rationed leak of Freon. Therefore, periodic refueling is not required for them.

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