Air conditioning mode heating, why does the cold air blow?

Taking a certain force air conditioner as an example, there are roughly three reasons why the air coming out of the air conditioner is cold air when the heating mode is turned on.

1. It may be caused by the control board of the internal unit stopping the power supply to the outdoor unit, because the motherboard relay of the indoor unit cannot withstand the maximum current due to the excessive running current of the outdoor unit.

2. It may also be caused by the overheating protection of the compressor of the outdoor unit of the air conditioner, and the heat dissipation effect of the outdoor unit is not good or the compressor is aging, resulting in the compressor turning off the temperature protection switch.

3. There may also be a four-way valve.

If the coil is caused by power failure, the coil needs to be replaced in time to prevent accidents.

In addition, the popular air conditioner generally turns on the heating mode, which requires 10 to 20 minutes of preheating preparation time, if the preparation time is exceeded, it may be that the air conditioner is faulty, and it is necessary to contact professionals in time for testing and maintenance.

Pay attention to the following points in the use of air conditioning heating mode.

1. The temperature setting should be appropriate, too high temperature will cause physical discomfort.

2. Keep the air circulating regularly, and you can open the window for ventilation in about two hours.

3. When the heating mode is turned on, a basin of water needs to be placed in the room, or a humidifier should be installed.

Make sure there is a certain amount of humidity in the room.

This answer applies to most brands of air conditioner models.

Winter is coming, the temperature of the air conditioner can not be too high, generally the first ten minutes are not too hot, or there is no wind directly, it is recommended to turn on the electric auxiliary heat, the temperature is set to 22-25 not too high, it is useless.

The reason for the hot air coming out of the refrigeration mode.

1. Check whether there is still refrigerant in the air conditioner, if the refrigerant is insufficient, add refrigerant, and there will be hot air in the case of refrigerant leakage or consumption.

2. If there is no hot air at the air outlet of the outdoor unit, it is likely that the thermal protection makes the compressor not work, resulting in the air conditioner being set in refrigeration, but not refrigeration.

3. Look at the setting mode on the remote control, if the mode is indeed the refrigeration mode, it should be a broken four-way valve or a broken computer board, it is recommended to contact the after-sales service.

The reasons for the hot air refrigeration of the air conditioner are as follows: 1. Problems with the electronic control system, and the hot and cold modes are chaotic. 2. The temperature sensor fails, and the protection against overcooling and overheating is ineffective. 3. There is a problem with electric heating. 4. The quality of the product itself.

Generally, there is a problem with the refrigeration part and cannot be refrigerated.

The air conditioner is not refrigerated: there are many reasons, generally the following situations: wrong settings, broken remote control, broken control board, leakage or insufficient refrigerant, blocked pipes, broken connection lines of indoor and outdoor units, broken compressors, etc.

It is recommended to find a professional maintenance personnel to check the repair. FYI.

Why is the air conditioner heating and blowing cold air?

Taking Haier, Gree, and Midea air conditioners as examples, the reasons for the cold air generated by the air conditioner are:

1. When just heating, the internal machine is not windy, and the hot air will be blown after a certain temperature needs to be preheated, which is about the cold air of the air conditioner.

2. Carefully check whether the remote control or button of the air conditioner is pressed to make heating, and press the wrong button to adjust it.

3. If the temperature is not high or the air is still cold after 15 minutes of using the air conditioner, it may be that the refrigerant inside the air conditioner is leaking, and you need to find a professional to fluoride the air conditioner.

4. Generally, the air conditioner will carry out a defrosting process during the heating process, and the internal and external machines of the air conditioner will automatically stop working during the defrosting process, and the heating function will be automatically turned on again after the defrosting is over.

The main reasons are: 1. The air conditioning mode is not adjusted correctly, if the air conditioning heating mode is adjusted to the refrigeration mode, the air conditioner will blow cold air. 2. When the air conditioner is just heated, it will blow cold air for a while, and the temperature will come up slowly. 3. The air conditioner may also leak the refrigerant of the air conditioner, which will produce this phenomenon.

Suggested treatment: 1. When using the air conditioning heating mode, you need to switch and set the mode on the remote control, if the adjustment or setting is wrong, there will be cold air. The specific solution is to turn back the heating mode, which is the "sun" logo on the remote control panel, and be careful not to choose the wrong one.

2. When the air conditioning heating mode is started, the air conditioner will blow cold air for a while at the beginning, at this time, the heat sink of the air conditioner is gradually heating up, when the temperature rises, the air conditioner will blow out hot air, you need to wait for about 5-10 minutes, don't be impatient. 3. The solution to this situation is to find the leakage point, repair it, or replace the leaking parts, and then add a part of the refrigerant to the air conditioner.

1. The reason for blowing cold air when the air conditioner is heating

1. When the machine is just heated, there is no wind in the internal machine.

Before the hot air blows out, it needs to be preheated to a certain temperature. This is the cold wind of the air conditioner. Of course, some air conditioners use the anti-cold air function for a long time. There will be cold winds.

2. Take a closer look at the remote control of the air conditioner or whether the button is heated, and it will not be wrongly pressed, and the adjustment will be pressed by the wrong button.

3. If the air conditioner is used for 15 minutes or the temperature is not high or still very cold, the refrigerant in the air conditioner may leak.

You need to find a professional to use fluoride in your air conditioner.

4. Normally, the air conditioner will carry out the defrosting process during the heating process, and the air conditioner will automatically stop working inside and outside during the defrosting process.

When the defrost is over, the heating function will automatically turn on again.

5. If the above reasons are not possible, the CT coil is opened or no load is detected, and the compressor is not allowed to run or the CT current transformer circuit of the outdoor computer board is disconnected.

External plates and external machines need to be replaced.

Second, what to do if the air conditioner heats and blows cold air?

1. Generally, due to the relatively small power of the air conditioner, the large room area, and the small number of air conditioners, the indoor heating is insufficient, and the number of air conditioners is increased.

2. In fact, the heating effect of many air conditioners is not good, because there is no electric auxiliary heating function.

It is difficult to meet indoor temperature demands with indoor and outdoor heat exchange alone. Especially when the outside temperature is relatively low, it is more difficult to exchange heat with the air conditioner.

Heating wires that need to convert electrical energy into heat.

3. There is an air filter inside the air conditioner, which can filter out the dust in the outdoor air.

However, after a long period of use, the filter and indoor and outdoor machines will be clogged with foreign objects. If there is too much dust, the air volume at the air outlet will be reduced, and the air conditioner will not be able to dissipate heat in time, resulting in insufficient thermal efficiency.

After using the air conditioner for a while, be sure to pay attention to cleanliness. If it is not cleaned regularly, the filter element of the air conditioner will be blocked by dust, and the blowing air will have dust, and the heating effect will be worse.

The filter needs to be cleaned.

Why does the air conditioner blow cold air for heating, as follows:

1. It may be because the hot air that has just been turned on is not stable, causing it to blow cold air, which is a normal phenomenon, and it will start to blow warm air after 10 minutes.

2. Or due to long-term use, the refrigerant inside the air conditioner is partially leaked, resulting in insufficient refrigerant in the air conditioner, and the wind blowing out at this time is sometimes not hot, sometimes cold air, and it is necessary to add freon to the air conditioner.

3. After the air conditioner has been used for a long time, too much dust in the filter will affect the air volume of the air conditioner, so the heating of the air conditioner is not good, and the wind blowing out does not have too much temperature, so the dust on the filter should be cleaned.

Air conditioning, the basis of the interior is a heat pump. Heat pump systems are notoriously efficient, not only in air conditioners, but also in many electric water heaters and clothes dryers.

Why not use air conditioning for heating:

In companies and shopping malls, you can occasionally see people using air conditioners for heating. But in the family, almost no one uses the air conditioner for a long time, why is that? The main reason is that the heating effect of the air conditioner is poor and slow, and it needs to be turned on for a long time to feel warm.

This is because air conditioners are heat carriers, and they need to carry heat from the outside to the interior when heating. However, in winter, there is not much heat outside, and it is naturally more difficult to transport. So comparatively speaking, air conditioners are more suitable for refrigeration.

1. When the air conditioner is first turned on, the hot air is not stable, and the cold air is blown out, which is a normal phenomenon, and the warm air will start to blow after about 10 minutes.

2. Because of long-term use, the refrigerant inside the air conditioner is partially leaked, resulting in insufficient refrigerant in the air conditioner, and the wind blowing out at this time will not be hot or cold.

3. After the air conditioner has been used for a long time, too much dust on the filter screen will affect the air output of the air conditioner, so it will lead to poor heating of the air conditioner or even the air blowing out has no temperature.

The anti-cold air function of the air conditioner is a kind of protection function, which is designed to prevent the indoor temperature from being low when the air conditioner is turned on in winter, or for other reasons, the temperature of the indoor coil unit of the air conditioner is low, so that the wind blowing out is cold, and this anti-cold air function can play a role in preventing the cold wind from blowing out.

Generally, if the air conditioner does not have the function of preventing cold wind, when heating in winter, the air conditioner will blow cold air as soon as the air conditioner is turned on, which will make people very uncomfortable.

1. When just heating, the internal machine does not have air, and it needs to be preheated at a certain temperature before blowing hot air, which is the anti-cold air function of the air conditioner.

2. Take a closer look at the remote control or button of the air conditioner to see if it is pressed for heating, whether it will be pressed wrongly, and if it is wrong, you can adjust it by pressing the wrong button.

3. If the refrigerant of the air conditioner is insufficient, the wind blowing out at this time will not be hot or cold, and the refrigerant needs to be added.

Fluoridation method. 1. Turn on the air conditioner and then add it from the low pressure, when it is added, you can do it, and then observe the refrigeration effect of the air conditioner. If possible, the high pressure should not be exceeded.

2. When the air conditioner is out of use, add fluoride from the place where it is added. It is appropriate when the system pressure is reached.

3. Let the air conditioner run for 30 minutes and do a careful inspection.

Answer pro, hello ( , I am very happy to serve you, it is a kind of fate and a kind of luck to meet you here, I hope that today you are a little happier every day than yesterday, here for the questions you raised and for you to find more suitable information is:

The heating effect of the air conditioner is not good, partly because the air filter has too much dust and the vents of the internal and external units are blocked by foreign objects.

The function of the filter screen is to adsorb the dust in the air, if the dust is too much and not cleaned in time, the air circulation will be blocked, resulting in the reduction of the air outlet volume, so that the heat in the machine can not be brought out by the flowing air in time, resulting in insufficient heat production, this is not a fault, it belongs to the maintenance of the air conditioner, just remove the air filter regularly to clean, it can be restored to normal.

Fluoride deficiency can also be one of the factors contributing to failure. At present, most people use heat pump type or heat pump plus auxiliary electric heating type air conditioner. Both air conditioners work by using freon to absorb heat from the outside air as it evaporates.

When the outside temperature is low, the temperature difference with the evaporation temperature of freon is smaller, and the heat exchange effect becomes worse, and the hot air is less.

Therefore, if it is an old model, the service life is longer, the wear of the compressor is larger, and when the outdoor temperature is below 0, the heating effect of the air conditioner is difficult to be satisfactory. In addition, if the nut at the copper pipe horn is not tightened during the installation of your own air conditioner, or the machine has been moved, the problem is likely to be caused by a lack of fluorine.

In addition to this, line control failures are also common. For example, if the external unit is not working, it is most likely due to the failure of the capacitor, temperature probe or motherboard.

Other reasons. Many people will feel strange that the air conditioner is still used well in summer, why can't it be used in winter?In fact, the refrigeration and heating components of the air conditioner are separated, so the refrigeration function is normal, and the heating is abnormal, the problem may lie in the four-way solenoid valve or its control circuit, or it may be the AC contactor, thermostat and over-temperature fuse fault of the electric heater and its power supply circuit, these faults need to be determined after the maintenance personnel of the air conditioning manufacturer or professional repairmen come to the door to test.

1. At the beginning of heating, the internal machine is not windy, and it needs to be preheated to a certain temperature (when the indoor unit evaporator preheating temperature is about 25 degrees) to blow hot (warm) air, which is the effect of air conditioning against cold wind, if the temperature is not high or cool after 15 minutes, it proves that there is a problem with the air conditioner, and 90% of it is a refrigeration leakage.

2. Please make sure that the heating setting is correct, the machine will start and stop when it reaches the set temperature, which can save electricity. When the air conditioner is turned on for heating in winter, there will be a defrosting process, and the internal fan (external fan) will stop working during defrosting, and it will be turned on again after the defrosting is completed, and the heating operation will be automatically resumed.

3. Eliminate the above reasons, this problem may be CT coil open circuit protection or detection of no load, the fault is preliminarily judged to be that the compressor is not running or the CT current transformer detection circuit of the outdoor unit computer board is broken, and the outdoor unit computer board needs to be replaced or there is a problem with the outdoor unit EEPROM, and the outdoor unit EEPROM fault alarm, mostly the program integrated circuit of the outdoor unit computer board is damaged.