What is the fault of the car air conditioner not cooling?

1.Insufficient refrigerant: The air conditioning of the car is usually added once every 2 to 3 years, and the loss of refrigerant is mainly leakage.

If your car has a defect in the air adjustment and it will start to be defective after a period of refrigerant refrigeration, then you need to pay attention. 2.Flap plate damage:

Damage to the flap motor is rare and not unheard of. If there's a problem with the flap motor, it's troublesome. The flap motor is generally located at the lower part of the instrument panel and belongs to the main switch of the air conditioner.

If it's broken, the switch is broken. Even if the air conditioner can cool down, the cold air can only come out of the cracks, and it is still drinking to quench your thirst. 3.

The condenser is too dirty: in summer, it is often found that the car is not cooled, there is no problem with the air detection system, and the high and low pressure is basically normal. When going to a 4S shop to repair a car, it is often recommended that the owner do an activity of cleaning the water tank.

The main purpose of cleaning the tank and condenser is to dissipate heat. In spring, poplar catkins are pasted on the condenser, which will lead to the phenomenon of excessive engine temperature or improper air conditioning. Therefore, every time after spring, car owners must check whether there is a lot of hair on the water tank.

When cleaning, you must pay attention to blowing it clean with a spray gun first, otherwise cleaning with a water gun will be counterproductive. Not only does the difference in empty fuel consumption increase. 4.

Damage to the empty compressor, throttle valve, or expansion valve: The empty compressor is unlikely to be damaged, so we don't have to worry too much about it. As for the poor adjustment caused by the failure of the expansion valve and throttle valve, these inspections are cumbersome and need to be repaired by a professional repair shop.

5.Belt aging is too loose: belt is also a relatively neglected component, generally the belt in the maintenance of the 4S shop will remind you to replace, in case there is no change in the use of the project will appear slippage, will cause belt breakage, belt noise, no assistance, poor air conditioning, etc., so it is also very necessary to check the engine belt.

1. The lack of refrigeration of automobile air conditioning may be caused by the lack of refrigerant R134A or the damage of the compressor, which is the heart of the automobile air conditioning refrigeration system, which plays the role of compressing and transporting refrigerant vapor.

1.Too much refrigerant causes insufficient refrigeration Too much refrigerant is generally caused by overfilling the refrigerant during maintenance, because in the air conditioner.

2.Too little refrigerant causes insufficient refrigerant Most of the causes of insufficient refrigerant are due to small leaks of refrigerant in the system. In case of air conditioning.

3.Refrigerant and refrigeration oil contain too many impurities, micro-blockage and cause insufficient refrigeration capacity If in the entire air conditioning system, refrigerant and refrigeration.

4.There is water infiltration in the air conditioning and refrigeration system, resulting in insufficient refrigeration There is a component in the refrigeration system that is the drying tank (bottle), which is one of its main parts.

5.Air in the system is also one of the causes of insufficient cooling Once air enters the air conditioning system, it will cause the pressure of the refrigeration pipe to be too high.

The following points need to be checked when the air conditioner is not cooling:

1. Whether there is a refrigerant in the system, if not, it needs to be pressurized to check the leakage, and then add enough.

2. If there is refrigerant, check whether the compressor is working. If it is not working, you need to check whether there is any problem with the air conditioner pressure switch, temperature control switch and its wiring.

3. Check the heat dissipation of the air conditioner to see if the fan is working. Clean the condenser.

4. Replace the air conditioner filter, the filter element is too dirty, and it will also cause no refrigeration.

It is possible that the air conditioner and air conditioner filter are too dirty, resulting in poor heat dissipation of the air conditioner condenser and insufficient air outlet: it may also be that the belt is aging, causing the air conditioner compressor to work abnormally and causing the air conditioner to not be cool; Or it is a problem with the air conditioner compressor, air conditioner temperature sensor, etc.

1. The condenser is a heat dissipation component in the automobile air conditioning system, which is generally located in the front position of the front of the car, which makes it easy to adhere to all kinds of dust and debris leaking from the gap in the engine cover. For example, catkins in spring, etc., attached to the condenser will cause poor heat dissipation of the air conditioner condenser, which will directly lead to the air conditioner not being cool.

2. With the increase of use time, the dust and impurities adsorbed on the filter element will also increase. When the accumulation of dirt reaches a certain level, the surface of the air filter element is easy to block, resulting in insufficient air output of the air conditioner, which in turn affects the normal cooling effect of the air conditioner.

3. The air conditioner in the car is generally in external circulation mode by default, if the car air conditioner is not cold, it may have been in long-term external circulation mode. Because the external circulation will bring in the external hot air, the cooling effect will not be as good as the internal circulation mode.

It may be due to too much refrigerant, which reduces the cooling effect.

The refrigerant and refrigeration oil contain too many impurities, and a slight blockage occurs, resulting in insufficient refrigeration capacity. Too little refrigerant, insufficient refrigerant leads to insufficient refrigeration capacity. If the condenser is too dirty, the compressor drive belt will also be relaxed, and the air conditioner will not be cold.

There are certain requirements for the proportion of refrigerant in the volume of the air conditioning system, if the proportion is too much, it will affect its heat dissipation, because the heat dissipation capacity is large, and the cooling capacity is small. Too little refrigerant, not enough refrigerant. Most of the causes of refrigerant deficiency are due to small leaks of refrigerant in the system.

The basic process of automobile air conditioning and refrigeration:

1. Compression process: inhale the low-temperature and low-pressure refrigerant gas at the outlet of the evaporator, compress it into high-temperature and high-pressure gas and discharge it out of the compressor.

2. Heat dissipation process: The superheated refrigerant gas at high temperature and high pressure enters the condenser, and is condensed into liquid to dissipate heat by the reduction of pressure and temperature.

3. Throttling process: the volume of the refrigerant liquid with higher temperature and pressure becomes larger after passing through the expansion device, and the pressure and temperature drop sharply, and the expansion device is discharged with fine droplets.

4. Endothermic process: the mist refrigerant liquid enters the evaporator, and the boiling point of the refrigerant is much lower than the temperature in the evaporator, so the refrigerant liquid evaporates into gas.

The problem of the air conditioning control switch, the warm air and the cold air are controlled by this switch, once it is broken, one of the functions will fail, go to the 4S store to change one.

The room temperature sensing head of the automobile air conditioner reaches the set temperature.

If the refrigeration pipe is not cold, it means that the refrigerator compressor is broken!

1.Refrigerant leaks. (It is manifested that the internal and external machines are working, and the compressor is also working, but it is ineffective).

2.The compressor capacitor is damaged or defective, causing the compressor to not work. (The phenomenon is similar to the above, but the compressor does not rotate and overheats).

3.The resistance value of the temperature sensing head at room temperature changes, resulting in the air conditioner not working. (The phenomenon is the same as when the air conditioner stops after reaching the set temperature).

4.Bad remote control or bad air conditioner receiver. (Manifested as no reflection of the air conditioner when it is turned on, or it does not work from time to time).

Step 5Four-way valve (single chiller does not have this failure) or compressor high and low pressure string, air conditioning works but has no effect. (The phenomenon is the same as the first one).

Step 6The failure of the control panel of the internal or external unit of the air conditioner causes the air conditioner to not be refrigerated. (Manifested as no reflection when turned on or the air conditioner is messed up).

7.The power supply of the air conditioner is reversed. (This failure occurs in a small number of air conditioners, usually at the time of installation).

8.The internal or external fan is damaged (the capacitor is more broken), and the external fan is damaged by the high exhaust temperature or high voltage protection. If the fan of the internal unit is bad, the internal machine is frosty, the external unit has been working, and the internal machine will condense ).

When summer is coming, all car buyers expect to have a comfortable environment when driving, but when you want to blow the air conditioner in summer, it is very likely that the air conditioner is not cool, or even there is no air conditioning at all. Such problems are most likely caused by refrigerant leakage or poor refrigerant quality, damaged or defective compressor capacitance.

The loss of refrigerant is mostly leakage-oriented, if the car is not good in air conditioning, and gradually deteriorates after a period of time after filling the refrigerant, this situation generally occurs, most of them are to prick the rhythm of blood, if the condenser leaks must be dismantled and replaced with the condenser, the method of checking the leakage is also very difficult, generally it is true that fluorine oil is added to the luminescent agent with special myopia glasses query, you can find out where the leakage is. There is also a relatively simple method applicable to the wet condition of organic oil on the surface of the condenser through the air intake grille when the leakage is more serious, and the condenser is generally leaking when there is such a situation.

In summer, it is often found that the air conditioning is not good, to check that there is no problem with the air conditioning system software, the high and low pressure are basically normal, and when you go to the car 4S shop to repair the car, it is usually highly recommended that the car buyer do a theme activity of cleaning the car water tank. Clean the water storage tank, the meaning of the condenser is mainly heat discharge, the spring catkins are pasted on the condenser, which will lead to high temperature of the car engine or poor air conditioning, so every time the spring has passed, the riders must check whether the water storage tank is pasted with a lot of small hair. When cleaning, you must pay attention to the first blow gun to clean up, in the tap water gun to clean or the gain outweighs the loss, not only the air conditioner is not good, but also the fuel consumption will increase.

There is a saying in the circle about air conditioning and refrigeration compressors that "low pressure is high, and low pressure has to be replaced by refrigeration compressors", and the probability of damage to air conditioning and refrigeration compressors is not large. For air conditioners, expansion valves and one-way throttle valves are common, and the failure immediately causes the air conditioner to be suboptimal. This kind of inspection is more complicated, and you must find a more professional auto repair shop for maintenance.

Belt is a bit neglected component, generally belt in the maintenance of the car 4S shop will prompt the buyer to replace, in case of not replaced in the application of the project will occur deviation, will lead to belt rupture, belt abnormal sound, no boost, poor air conditioning, etc. Therefore, it is also necessary to inspect the engine belt of the car.

It may be because there is a problem with the filter chip of the car, or it may be because there is a problem with the air conditioner of the car, so it will cause such an impact, and such a process will also cause serious damage to the car itself.

It may be because there is a problem with the filter chip of the car, or there are a lot of problems in the body, and the damage is relatively high, and it is also harmful to the car itself.

It may be that a lot of dust has been accumulated, or the heat dissipation effect is not good, and the compressor is not working, which will lead to the situation that the car air conditioner is not cooled.

The reasons why the car air conditioner does not refrigerate are: lack of refrigerant, damage to the air conditioner flap, dirty condenser, damage to the air conditioner compressor, throttle or expansion valve.

1. Lack of refrigerant: leaking car air conditioner generally adds refrigerant every 2 3 years, the lack of refrigerant is mainly leakage, if your car air conditioner is not cold, and it is not cold soon after adding refrigerant, please pay attention to check whether there is leakage.

2. Damage to the air conditioning flap: There are very few faults in the damage of the air conditioning flap motor, not that it has not occurred, the flap motor is generally in the lower part of the instrument panel, which is the main switch of the air conditioning tuyere, it is damaged means that the switch is damaged, even if the air conditioner can be refrigerated, the cold air only blows out of the slit and comes to the hidden search, the effect is not so significant, you can go to the 4S shop to find professionals for maintenance.

3. The condenser is too dirty: the purpose of cleaning the water tank and condenser is mainly to dissipate heat, if the condenser is too dirty, the heat dissipation effect is not good, resulting in the air conditioner not being refrigerated, and the owner needs to clean it in time.

4. Damage to the air conditioning compressor, throttle or expansion valve: The probability of damage to the air conditioning compressor is very low, if the expansion valve or throttle valve fails, the air conditioner will not be refrigerated, and it needs to be repaired in a 4S shop.

5. Belt aging: If the belt is aging, slippage will occur in the use process, resulting in belt disconnection, abnormal belt noise, no assistance, air conditioning and other reasons, which need to be checked and replaced in time.

Pro: There are several reasons why the car air conditioner does not refrigerate: 1. Condenser failure:

The front part of the condenser is a part that is very easy to be clogged by dirt, and there will be a lot of dust on the condenser when the car is driven for a long time. If you drive on a dusty road for a long time, there will be more dust on the condenser. The dust of the condenser is full of holes and slag, and the heat dissipation effect will be greatly reduced.

The heat dissipation effect is not good, the air conditioner is naturally not cold 2, the compressor is not working 3, the air conditioning system lacks refrigerant (usually said to be less freon) 4, the expansion valve is faulty 5, the evaporator is faulty 6, and the temperature sensor is faulty.