What is the reason why the Mercedes Benz C Brigade 11 does not have cold air for a long time after i

1. Select the external circulation mode or the temperature knob switch for the heating position. If you only choose to supply air, it is the natural circulation of the ambient temperature in the car, and the temperature in the car is high, so you think it is hot air. Most likely, the outer circulation and temperature knobs are located in the red heating area on the right.

Causing hot air from outside the car to enter the car.

Second, there are the following reasons:

1.The most likely cause is a lack of refrigerant.

2.The second is the poor heat dissipation of the radiator.

3.The evaporator has a poor heat exchange effect.

4.The compressor is old.

Defrost operation is carried out.

After the air conditioning heating operation for a period of time, due to the low temperature and humidity of the outdoor environment, the refrigerant is also a low temperature working condition, resulting in the fin of the outdoor heat exchanger begins to frost, when the frost reaches a certain thickness, it will seriously affect the heat exchange efficiency, so that the heating temperature blown out of the room is getting lower and lower, so it is necessary to defrost the fin of the outdoor heat exchanger.

There are usually two ways to defrost:

1. Electric defrosting. Electric defrosting is to use the electric heater installed in the outdoor unit to dissolve the frost after heating up.

2. Defrost the refrigerant system. It is the air conditioner that automatically switches to the refrigeration operation mode, so that the hot refrigerant flows through the outdoor unit for defrosting. After the frost melts, the air conditioner will run back to hot again.

The reason for the failure of the hot air is that the fan of the outdoor unit does not rotate.

Solution: 1. The fan capacitor is broken, replace it with a new one.

2. If there is a foreign object stuck in the fan, if there is, you can remove it.

3. The cooling fan is broken, and you have to find a professional to replace it, which is more troublesome, and you have to change the screw position if you don't do it.

4. The computer board or sensor is broken, and there is no power to the external fan.

After the air conditioning heating operation for a period of time, due to the low temperature and humidity of the outdoor environment, the refrigerant is also a low temperature working condition, resulting in the fin of the outdoor heat exchanger begins to frost, when the frost reaches a certain thickness, it will seriously affect the heat exchange efficiency, so that the heating temperature blown out of the room is getting lower and lower, so it is necessary to defrost the fin of the outdoor heat exchanger.

If it is not refrigerated suddenly, if it is an ordinary machine, it should be that the compressor starter is broken, and the compressor is not started The external machine you see keeps rotating In fact, it is just the fan rotating, you can put your hand on the external machine to try whether the external machine has vibration, and there is also a situation that the air conditioner has no refrigerant (in this case, the new machine generally does not appear),

It may be that the four-way valve is broken, if so, the internal unit and the pipe will be very cold, and the other situation is that the compressor is not working.

Call customer service again and urge them to come to the door. Hehe.

There are many reasons why it is not cooled.

Refrigerant is missing, compressor low pressure protection. Too much refrigerant, compressor high pressure protection. (Just put the potion) the external machine has poor heat dissipation. (Check if the external motor is operating normally?) Is the capacitance normal? Are the fins clean? Hundred.

The compressor does not start. (Check whether the compressor capacitance is normal, and whether the compressor winding group is normal?) Whether the power supply of the internal unit is transmitted to the external unit.

Check the internal and external circuits) The internal circuit board is faulty, resulting in the signal being unable to be transmitted to the external machine. (Replacement circuit board) for details, please call us or make an appointment for maintenance.

The compressor is not working! But it shouldn't be bad! There are many reasons why the compressor doesn't work!

The reasons why the car air conditioner does not have cold air after being turned on for a long time may be as follows:

1. Lack of refrigerant

The loss of refrigerant is mainly leakage, if the car is not cool when the air conditioner is not cool, and it begins to be not cool after a period of time after adding refrigerant, it is necessary to pay attention to it. If the condenser leaks, the condenser needs to be replaced, and the leakage is generally checked by adding fluorescent agent to the fluorine oil and checking it with special glasses to find out where the leakage is.

2. The condenser is too dirty

The air conditioning condenser and water tank are located at the front of the car, and when the vehicle is driving, the air will enter here along the ** air intake grille, and the dirty things such as flying flakes and leaves entrained in the air will adhere to the air conditioning condenser and water tank radiator.

3. The compressor drive belt is too loose

The drive belt of the air-conditioning compressor is relaxed, and the compressor will slip when working, causing the transmission efficiency to decrease, so that the compressor speed decreases, and the delivery of compressed refrigerant decreases, so as to directly reduce the refrigeration capacity of the air-conditioning system.

Car air conditioners are prone to accumulating bacteria:

Automobile air conditioners, evaporators, fans, etc. are in a closed and dark state for a long time, and the internal environment is hot and humid. After the impurities, dust, bacteria, and viruses in the air enter the air conditioner, they are bonded with condensate and blocked on the evaporator and other parts. Over time, a large amount of dirt, nicotine, mold, fungus, etc. are adhered to.

This situation is mainly caused by the structural characteristics of the air-conditioning system itself, the air-conditioning system mainly uses fluorine or 134A as the medium, and the purpose of refrigeration is achieved through the transformation of system pressure. It consists of an evaporation tank, an expansion valve, a compressor, a blower, a condenser, a drying tank, and a pipeline.

When the air conditioning system is working normally, the evaporation box works in a cold environment, and water will be generated when it encounters the relative hot air outside, which is also the reason for designing the water pipe in the evaporation box structure; The humid environment of the evaporation chamber and ventilation ducts and the dust on the surface provide a breeding ground for mold and fungus.

Hello, you suspect that the heat dissipation of the freon system is not well protected. [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

Check for freon deficiency. [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

Hello. Lack of air conditioning refrigerant, thank you for your support to the car master, I wish you a happy life [If you have a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

There is a lack of freon, and the pressure cannot reach [There is a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

Failure of the expansion valve or over-charge of refrigerant. It is recommended to make a pit stop for maintenance. [If you have a problem with the car, ask the car master.] 4S shop professional technician, 10 minutes to solve. 】

Hello, there is a lack of fluoride Go to the repair shop to add some [If you have a problem with the car, ask the car master. 4S shop professional technician, 10 minutes to solve. 】

Possible Causes:

1. Freon is not enough (commonly known as fluoride deficiency).

Most of the reasons for this non-refrigeration are in the air conditioner that has been used for three or four years, and most of them are also a normal phenomenon, which belongs to the normal consumption of air conditioning refrigerant due to long-term use, but this is only manifested as insufficient refrigeration compared with the previous normal situation, and it will not be completely uncooled, because the pressure is not enough, and it will not be too far from the normal value.

2. The power of the air conditioner is not enough to refrigerate.

This is also one of the reasons for a common non-refrigeration (poor refrigeration effect), but there are many reasons for this non-refrigeration, such as: small power air conditioning pipes and large areas of the room, and some although the air conditioning power and the room area seem to match, but because the room is relatively unsealed (such as doors and windows are wide open, etc.), or there is a heat source in the room (such as a computer), of course, the glass room is also one of the heat sources.

3. The air conditioner is not refrigerated due to the high temperature of the outside environment.

This uncooled condition is common when our outdoor units are installed in a relatively enclosed space or when the temperature around the outdoor unit is too high. For example, in order to look beautiful, some real estate units are installed in a hidden small space or even multiple outdoor units in a small space, so it is extremely easy to cause the heat emitted by the radiator to flow away due to the lack of air circulation in the small space where the outdoor unit is located, so that the air conditioner is not refrigerated.

4. The air conditioner is not cleaned and maintained for a long time.

After buying an air conditioner, everyone thinks that you can sit back and enjoy it with peace of mind, but in fact, we have to regularly maintain the air conditioner in many aspects. One of them, because the outdoor unit is installed outdoors, everyone is relatively easy to ignore it, the outdoor unit after a long time of use will make the radiator absorb a lot of dust and garbage and other dirt, so that the heat dissipation effect of the radiator is poor and the air conditioner is not refrigerated.

It could be due to the following reasons.

1.If the refrigerant is insufficient or there is a leak, add refrigerant.

2.The refrigeration system is clogged.

3.The filter has accumulated too much dust, and the filter is cleaned.

4.The compressor itself is inefficient.

Generally, it is mostly due to the poor refrigeration effect caused by the management of fluorine deficiency. When the air conditioner is working, check the temperature of the thick pipe joint of the outdoor unit, if the temperature is not very cold, it is mostly caused by the lack of fluoride.

1. The reason why the air conditioner does not refrigerate.

1. The compressor is not working.

2. There is no refrigerant in the system.

3. The system is blocked.

4. The internal machine does not run.

5. Compressor or four-way valve string.

6. The outdoor temperature is above 43 degrees.

Second, the reason for the poor refrigeration effect of air conditioning.

1. The refrigerant of the system is insufficient.

2. The system is slightly blocked.

3. The internal fan network is blocked.

4. The heat dissipation effect of the external unit is poor.

6. The temperature control circuit is faulty.

7. The speed of the internal fan is too slow.

8. The room is too large or has poor thermal insulation performance.

9. Too much refrigerant liquid.

10. The exhaust is not enough when the air conditioner is installed.

11. Four-way valve string.

12. The power supply voltage is unstable.

There are generally several reasons why air conditioners are not cooling:

1.Due to the long-term lack of maintenance of the air conditioner, there is too much dust and the air conditioner is dirty. Suggestion: Do a cleaning and maintenance.

2.Due to the high electricity consumption in summer, the voltage will be low and the air conditioner will not be started. Recommendation: Add a voltage regulator.

3.The air conditioner lacks fluoride (commonly known as "refrigerant" is not enough). Suggestion: Add fluoride to the air conditioner and make up the amount.

As well as some other reasons, please call us for details.

Let's find someone to take a look.,In short, it's not something you can do by yourself.,It's not caused by the remote control or the fault of bad contact.,Tell you what you can do by yourself.。

It may be that the fan of the air conditioner is broken, and ask the air conditioner maintenance worker to replace it for you.

You see if the air inlet is too dirty

Freon is not enough (commonly known as "refrigerant" is not enough).

When the ambient temperature is about 35 degrees Celsius, 1, low pressure and high pressure 3, static pressure.

This is a normal situation, usually in the case of an old air conditioner that has been used for three to four years. The air conditioner did not completely stop cooling, but the effect of cooling decreased. This is because old air conditioners use freon as a refrigerant, which will evaporate over a long period of time.

Therefore, users only need to add a little to the regular air conditioning maintenance point. In addition, it is not excluded that improper installation can cause freon leakage and problems with the machine itself.

The supply voltage is not enough.

The normal starting voltage of the air conditioner is 220V+-10%. In China's power supply system with a phase voltage of 220V and a line voltage of 380V, almost all compressors above 200V can be started. At 180V or more, 70-80% can be started, and when above 160V, only a few can be started.

I've done it myself. Below 160V there is almost no possibility of starting. According to experience, when above 190V, the starting voltage of the compressor is more reliable.

The air conditioning was not powerful enough.

The general selection principle is: 150-250W square meters for cooling and 250-350W square meters for heating, in addition to comprehensive consideration of factors such as space height, level orientation, sealing performance and residential population.

The ambient temperature is too high.

There is a common saying: when the outdoor unit is in an environment above 43°, most air conditioners are difficult to transfer the heat from the indoor to the outside, resulting in no refrigeration.

The air conditioner is not cleaned and maintained for a long time.

If you want the air conditioner to operate normally and not affect human health, but also to prolong the life as much as possible, obviously, it is impossible to leave it alone as soon as you buy it and install it. Because the outdoor unit is exposed to the outdoors, it is easy to absorb dust and debris, and if it is not cleaned for a long time, it will affect the heat dissipation performance of the machine, resulting in the reduction of the refrigeration effect of the air conditioner. The indoor unit is related to the health of the human body, and if it is not cleaned for a long time, it will breed bacteria, pollute the air, and make people sick.

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

The maximum allowable length of the connecting pipe of the air conditioner shall not exceed 8 meters for one horse, 10 meters for the horse, and 15 meters for more than 2 horses. The height difference between indoor and outdoor units shall not exceed 5 meters.

Your question is not clearly formulated. What I mean by this is that there is no wind in your internal machine, let alone a cold wind. Obviously, there is a problem with the fan, and the fender of the sweeping wind is another independent motor control that has nothing to do with the fan, it may be that the fan is stuck, or the motor is faulty, or the fan output of the control line is virtually connected, which is a small fault.

with the refrigeration system in any relationship,

1. Air conditioning power supply problem.

There are many reasons why the air conditioner is not cooling, and we are checking why the air conditioner is not cooling. First of all, you need to check whether the power supply of the air conditioner is plugged in, whether the connection between the connector of the air conditioner and the power supply is not working, if the air conditioner is not connected to the power supply, of course, there will be no refrigeration.

Maintenance method: If there is a problem with the power supply of the air conditioner, you only need to plug the power supply of the air conditioner back in to ensure that the air conditioner can be energized normally.

2. The voltage of the air conditioner is unstable.

After we check the power supply of the air conditioner, we will see if the voltage of the air conditioner is unstable or insufficient. The voltage of the air conditioner is unstable and cannot reach the predetermined voltage of the air conditioner, just like people work without food, the air conditioner will work very hard, and the voltage will be unstable during the peak period of electricity consumption.

Maintenance method: At this time, the situation that the air conditioner is not refrigerated is not a situation that we can solve with a method, we need to start from the aspect of stabilizing the air conditioning voltage.

3. The refrigerant is not enough.

The reason why the air conditioner does not refrigerate is sometimes similar to the reason why the refrigerator does not refrigerate, all because the refrigerant is not enough, resulting in the air conditioner or refrigerator not cooling. Generally, the air conditioner has been used for a long time, the refrigeration effect of the air conditioner will become worse, and the refrigerant of the air conditioner will gradually volatilize with the change of time.

Maintenance method: The refrigerant of the air conditioner is not enough, as long as enough refrigerant is added for the air conditioner, the problem of the air conditioner not being refrigerated can be solved. However, if the refrigerant of the air conditioner is not enough because of the leakage of the refrigerant, we need to seal the cavity of the leaking part of the air conditioner by welding and repairing, and then add enough refrigerant to solve the problem.