Causes and solutions of air conditioning not cooling (must see at home! )

In early summer, the frequency of turning on the air conditioner is gradually increasing. Air conditioning failure is a common air conditioning failure problem. It's annoying that air conditioning doesn't cool in hot days, especially in summer in the south. There is no air conditioning and it's not cool. Knowing the reason why air conditioners can't cool, it's easy to find countermeasures. Let the air conditioner work normally. The common reason why air conditioners don't cool is compressor failure or no refrigerant in the system. Next, Tuba Rabbit Bian Xiao combined with common faults to provide effective solutions. If you use Haier air conditioner, you can also click to view: Why doesn't Haier air conditioner cool? Of course, it can also be solved by combining the following methods!

Summary of the reasons why the air conditioner does not cool: 1. External high temperature will not cause cooling. 2. Air conditioning power is insufficient. 3. The power supply voltage is insufficient. I haven't cleaned the air conditioner for a long time. 5.。 Snow seeds are not enough. 6. The copper tube between the outdoor unit and the indoor unit is too long. 7. The air conditioning system is blocked, causing throttling expansion at the blocked place. 8. The air conditioner compressor does not work, resulting in the air conditioner not cooling.

1. Causes and solutions of air conditioning not cooling due to excessive outside temperature.

Reason: The reason for this phenomenon is that the temperature around the outdoor unit is too high. In another case, the outdoor unit is installed in a relatively closed space. Small space is not conducive to the circulation of air, which will cause the heat of the air conditioner radiator to be unable to circulate, resulting in the air conditioner not cooling. When the outdoor temperature is higher than 43 degrees, it will also cause the air conditioner not to cool.

Solution: Change the use environment of the outdoor unit (away from high temperature environment or make the air around the outdoor unit easier to circulate).

2. The causes and solutions of no refrigeration caused by insufficient air conditioning power.

Reason: Different air conditioners have different power and different room sizes. A. the reason for this situation is that the big room has a small air conditioner, not the air conditioner itself. B: of course there is such a problem. There are several big windows in the room. They are open. C. or when there are many heating sources in the room (for example, multiple computers are turned on, fluorescent lamps are turned on, or a glass room is exposed to the sun). ).

Solution: A. Change the conditions of the use environment. B. Before buying an air conditioner, you must choose an air conditioner that matches the room. Increase the air tightness of the use environment. C. reduce the heat source in the air-conditioned environment and so on to solve the problem of no refrigeration.

Variable frequency air conditioner

3. Insufficient power supply voltage will also cause the air conditioner not to cool.

Reason: During the peak power consumption period, the power supply voltage will be unstable and the voltage will be insufficient, resulting in the air conditioner not cooling.

Solution: Try to use the air conditioner when the voltage is stable. Or choose to use electric fans during peak hours.

4. Causes and solutions of non-cooling caused by long-term non-cleaning of air conditioners.

This happens because there is a lot of dust and garbage on the radiator of the outdoor unit, and the cooling effect is not good, which leads to the cold air conditioner. If the air conditioner is not cleaned and maintained for a long time, it will easily lead to unclean indoor air and air conditioning diseases. Moreover, due to the poor heat dissipation effect, it will consume more electricity and the service life of air conditioners will be greatly reduced.

Solution: clean and maintain the air conditioner, so that the clean outdoor unit can withstand the heat dissipation in the later period.

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5. How to distinguish and solve the problem of air conditioning not cooling caused by insufficient snow species?

Troubleshooting: It can also be distinguished according to the indoor environment. Reaching out to the air outlet of the air conditioner, the temperature has not changed significantly. Or when the compressor is rotating and there is no cold wind blowing from the internal machine, it can be recognized that there is a lack of snow species.

It is normal for air conditioners to lack snow, which usually appears in 3-4 years. Old-fashioned air conditioners use freon as refrigerant, which will volatilize, and if the air conditioner is improperly installed, it will also cause snow leakage. When the summer temperature is 33 degrees, the indoor temperature is about 28 degrees. When you find that the thin tube from the outdoor unit is frosted or drips more than usual, it can indicate the lack of air conditioning and snow species.

Solution: Let the air conditioning maintenance point help to add snow seeds to solve this problem.

6. The copper tube between the outdoor unit and the indoor unit is too long.

Troubleshooting: Check whether the copper tube between outdoor unit and indoor unit is too long.

Cause: This is a problem left over from air conditioning installation. Improper installation will lead to too long ventilation pipe and low heat transfer efficiency, and will also lead to the air conditioner not cooling.

Solution: Try to shorten the length of copper tube between outdoor unit and indoor unit of air conditioner.

7. Solutions to air conditioning and refrigeration system blockage caused by air conditioning and refrigeration.

Judgment method: The outdoor unit is frequently started and stopped, and the indoor function can be remotely controlled for normal operation, but the starting and stopping time of the outdoor unit is about three minutes, and the air is not cold within three minutes, so it can be judged that the refrigeration system is faulty.

Solution: Remove the filter and capillary with nitrogen, and then blow out all the filters, capillaries, external evaporators and pipelines. Remove the dust inside.

8. Causes and solutions of air conditioning refrigeration caused by non-rotation of air conditioning compressor.

Judgment method: when the machine is turned on, the indoor unit runs normally, and the fan runs within a few minutes after the outdoor unit is turned on, but the compressor does not turn. (Judgment method of compressor not turning: Measure the current value in the outdoor unit junction box with a card meter, because the fan power is small, it is easy to make a judgment. )

Reasons for compressor not turning: ① Excessive current leads to thermal protection action (or poor contact) of compressor; (2) When the compressor is running, the capacitor capacity drops or is damaged; ③ Improper temperature control of air conditioner or damage of temperature detection probe. If the compressor runs without refrigeration, you can feel whether the joint of the liquid outlet pipe (thin copper pipe) of the outdoor unit is hot or not, and whether the suction pipe (thick pipe) feels very cold when running. If the suction pipe is not cold and the outlet pipe is not hot, it is a sign of insufficient fluorine gas and needs to be supplemented with fluorine gas; If the suction pipe is cold, check whether the fan of the indoor unit rotates.

Solution: If the compressor does not turn due to capacitor damage, it is recommended that the air conditioning maintenance company replace the capacitor.

Summary: In order to prolong the service life of the air conditioner, regular maintenance of the air conditioner can avoid the phenomenon that the air conditioner is not cooled, which is also beneficial to health!