Reasons for Air Conditioning Not Cooling

reasons for air conditioning not cooling

If the air conditioner is not cooling, or the cooling effect is poor, do you need to add freon? In fact, there are many factors that affect the cooling effect of air conditioners, and the lack of Freon is only one of them. Knowing a few main reasons why an air conditioner won’t cool can quickly solve the problem. If your air conditioner is not cooling, please follow the steps below.

Step 1: Check whether the power outlet is powered (if the air conditioner can be turned on, skip the first step and go directly to the second step). Use an electric pen or a small electrical appliance such as an electric fan to test the power supply. If it is normal, check whether the air conditioner is plugged in properly. After the air conditioner is re-energized, there will be a beeping sound or a display prompt. Then start the air conditioner with the remote control. If it cannot be started, you need to check whether the remote control is normal. If the remote control is normal but the air conditioner does not respond after pressing it, it may be that the computer board is faulty and needs to be repaired.

Step 2: Check if the compressor starts. After the air conditioner is turned on for cooling, the outdoor fan is running, but there is no cooling effect at all. In this case, it is very likely that the air conditioner compressor is not running. The specific symptoms are as follows:

  1. The inner unit of the air conditioner has no cooling effect at all, and the blowing temperature of the outer unit fan is the same as the natural wind (under normal circumstances, it is obviously hotter than the natural wind);
  2. The copper pipe of the outdoor machine is dry (there will be dew under normal circumstances);
  3. When you touch the external unit with your hand, there is no jitter (under normal circumstances, there is obvious jitter).

If the above 3 points are met, it can be basically determined that the air conditioner compressor has stopped running. If the compressor stops running, it is usually caused by a fault in the air conditioning circuit or a mechanical fault. It is necessary to find professional maintenance personnel for maintenance.

Step 3: Check whether the air conditioner lacks refrigerant. Lack of refrigerant is the most common reason for an air conditioner not cooling. There are a large number of pipes in the air conditioning and refrigeration system, and the pipe connections cannot be completely airtight. As the operating time of the air conditioner increases, some of the refrigerants will slowly leak out, and the cooling effect will decrease accordingly. Many households now have tools for adding refrigerants. When the air conditioner is not cooling, check the down pressure to know whether it needs to add refrigerant.

Step 4: Check if the radiator needs cleaning. Air conditioners require heat exchangers for indoor and outdoor heat transfer. When the heat exchanger is covered with a lot of dust, spider webs, and other garbage, it cannot effectively dissipate heat, resulting in a poor cooling effect of the air conditioner. In this way, the heat exchangers of the inner and outer units need to be cleaned.

Step 5: Check if the voltage is stable. The power supply voltage will be unstable during the peak period of electricity consumption, and it will not reach the normal voltage required for the operation of the air conditioner, which will result in the air conditioner not cooling or having a poor effect. This phenomenon is more likely to occur when a large number of air conditioners are running at the same time during high temperatures. This kind of problem cannot be solved by individuals, and inverter air conditioners can be used.

Step 6: Check whether the ambient temperature of the outdoor unit is too high. Air conditioners in my country generally use T1 working conditions in a temperate climate environment, and the applicable ambient temperature is between -7°C and -43°C. When the environment is out of range (for example, the outdoor ground temperature can reach 60 ℃ when the temperature is high in summer), the outdoor radiator cannot effectively dissipate heat, which will cause the air conditioner to not cool. In addition to hot weather, this situation often occurs when the outdoor unit is installed in an enclosed space. The heat emitted by the outdoor unit accumulates in the enclosed space, causing the temperature in the space to be too high, which in turn makes the radiator unable to effectively dissipate heat. The solution is to change the environment in which the outdoor unit is used, such as moving away from the high-temperature environment or making the surrounding air of the outdoor unit easier to circulate. Turn off the power and use water to cool the external unit.


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