The air conditioner will blow hot air and cold air, what s going on

1.It may be that the indoor voltage is too low or too high, causing the air conditioner compressor to not work properly. In this case, it is necessary to wait for the indoor voltage to stabilize before continuing to use, or install a voltage regulator in the room.

2.It is also possible that the temperature of the air conditioner is set too high. When the indoor temperature reaches the set temperature of the air conditioner, the outdoor unit of the air conditioner will stop running, while the indoor unit will continue to blow hot air.

When the indoor temperature rises, the outdoor machine of the air conditioner will automatically start again, and then the indoor machine will blow out cold air. At this point, you should lower the set temperature.

3.It is also possible that the external air conditioner has been used for a long time, accumulating too many stains, and the heat dissipation effect has deteriorated, resulting in overheating protection after the compressor has been running for a period of time. When the external air conditioner gets cold, the outside air conditioner will start running again. At this time, the outdoor unit should be cleaned and kept clean and dry.

The air conditioner blows cold air first and then hot air, which may be caused by the phenomenon of the compressor protection device jumping out. Blowing hot air when tripping, compressor overload protection tripping means that the high-pressure pressure of the system is too high or the overheating current is too large.

When the refrigerant leakage in the pipeline of the air-conditioning system occurs to a certain extent, the suction temperature of the air-conditioning compressor will increase, the exhaust temperature will increase, and the refrigerant flow in the evaporator will be insufficient, resulting in the rapid decrease of the temperature of the heat exchanger coil after the indoor fan motor is turned on.

When the temperature of the coil is reduced to the temperature value of the anti-cold air protection set by the air conditioning program, the indoor fan stops running, and the air outlet temperature of the indoor unit of the air conditioner changes from high to low before the indoor fan motor stops running, which feels hot for a while and cold for a while.

Precautions for use:

Too much dust accumulation on the outdoor radiator of the air conditioner will reduce the efficiency, the outdoor radiator should be checked and cleaned regularly, and the outdoor unit of the split air conditioner should not be inserted with sticks and other objects, otherwise the fan will be stuck or damaged;

When you feel that the use of the air conditioner is not ideal, you should consult the instruction manual, analyze whether it is caused by improper use, find out the cause and correct it; When the fault cannot be dealt with by yourself after being found, you can find a professional maintenance technician in the original installation department to solve it, or contact the local service personnel of the brand company, and you can not repair it by yourself or find non-professionals for maintenance;

The air conditioner should be unplugged in time when it is not in use.

Cause Analysis:

1. Improper use or maintenance of air conditioners cause air conditioners not to heat: According to experts, about eighty percent of air conditioning heating failures are not machine problems, but improper use or improper maintenance of the machine by air conditioning users. When using air conditioning for heating in winter, pay attention to the airtightness of the room, if the outdoor unit has frost and icing, do not use hot water to defrost and ice, you should stop using the air conditioner, contact the maintenance personnel for inspection and maintenance.

2. If the air conditioner does not heat up due to too much dust: if the air conditioner does not remove dust for a long time, it is easy to make the air filter screen accumulate too much dust, and the air vent inside and outside the air conditioner is blocked by foreign objects. The air conditioner should be maintained frequently and the air filter should be cleaned regularly so that the air outlet can supply air normally.

3. The lack of fluorine in the air conditioner causes the air conditioner not to heat: now most air conditioning users use heat pump type or heat pump plus auxiliary electric heating type air conditioner, the working principle of these two air conditioners is to absorb heat from the outdoor air when the freon evaporates, when the outdoor temperature is low, the temperature difference with the evaporation temperature of freon is small, 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 degree of the compressor is larger, and when the outdoor temperature is below 0, the heating effect of the air conditioner is difficult to be satisfied.

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, it can be considered as a lack of fluorine; In addition, line control faults are also common, for example, if the external unit is not working, it is most likely due to capacitance, temperature probe or motherboard failure. If the air conditioner is fluoride, contact the air conditioner after-sales personnel as soon as possible to solve the problem.

4. The external environment of some air conditioners is also a factor that causes air conditioners not to heat: the temperature in Dalian is relatively low in winter, if the outdoor temperature is too low, the heating effect will be significantly worse, and the actual heat production is not enough. The usable heating area of the air conditioner is smaller than the actual area of the room, which will lead to factors such as insufficient heating of the air conditioner.

Air conditioning system.

The refrigerant leakage of a certain degree of DU occurred in the BAI pipeline, or it was caused by the abnormal return of the DAO motor of the indoor machine.

When a certain degree of leakage of refrigerant in the pipeline of the air-conditioning system, the suction temperature of the air-conditioning compressor will rise, the exhaust temperature will rise, and the refrigerant flow in the evaporator is insufficient, resulting in a rapid decrease in the temperature of the heat exchanger coil after the indoor fan motor is opened, and when the coil temperature is reduced to the temperature value of the anti-cold air protection set by the air-conditioning program, the indoor fan will stop running, and the air outlet temperature of the air conditioner indoor unit will change from high to low before the indoor fan motor stops running, and it feels hot for a while and cold for a while.

When the indoor fan motor or motor capacitance is abnormal, the air volume of the indoor unit becomes smaller, the heat of the indoor unit heat exchanger can not be effectively brought into the room, and the air conditioning compressor will be shut down for excessive exhaust pressure protection or overload protection during operation, and the hot air is blown when the compressor is running, and the wind blown out when the air conditioning protection shutdown compressor stops running is cold air.

In the event of such abnormal operation, it is recommended to report directly to the air-conditioning manufacturer for after-sales repair, and the maintenance personnel will overhaul and eliminate the fault on site.

If the hot air is blown for 40-50 minutes, and the cold air is blown for 20-10 minutes, this is a normal phenomenon.

Inner cream. If the hot air blowing time is short, it means that there is a problem with the unit. This needs to be repaired by professional personnel, because there are many reasons for this problem, and professional technicians need to eliminate it.

It is very likely that the capillary is clogged, causing the refrigerant to not continue to work.

Use 220V voltage air conditioner from simple to complex.

1 The voltage is lower than 220V, resulting in low pressure protection after the compressor is started for a period of time. (Normal 200V is the most exclusive air conditioner.)

The bottom line voltage, which you can measure the operating voltage of the air conditioner) 2 tube temperatureRoom temperature sensor issues.

3. The starting capacitance capacity of the compressor is reduced or the performance is poor, resulting in no operation for a period of time (listen to whether there is intermittent AC contact sound of the external unit).

4 Lack of refrigerant.

5 There is a problem with the electric control board or the four-way directional valve.

6 Compressor Problems.

Hello dear, the reason why the air conditioner will blow cold air after heating for a while: 1. The internal machine is not windy when it is just heated, and it needs to be preheated at a certain temperature before blowing hot air, which is about the cold air 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 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. 5. If none of the above reasons are true, it may be that the CT coil is open or the load is not detected, the compressor is not allowed to run or the CT current mutual sensing circuit of the computer board of the outdoor unit is broken, and the motherboard and EEPRO of the external unit need to be replaced.

Hello dear, happy to answer for you. The feeling of cold air in the heating of the air conditioner may be because the hot air that has just been turned on is not stable, causing it to blow cold air, which is also a normal condition, usually waiting for ten minutes to gradually blow warm air. Or due to long-term use, the refrigerant inside the air conditioner is partially leaked, resulting in insufficient refrigerant in the air conditioner.

At this time, the wind blowing out is occasionally not hot, and occasionally it is cold, so be sure to add freon to the air conditioner. After the air conditioner has been used for a long time, too much dust of the filter will interfere with the air volume of the air conditioner, because the heating of the air conditioner is not good, the wind blowing out is not too much temperature, and the dust on the filter should be quickly cleaned up. What to do if the air conditioner heats and blows cold air:

The first step of heating when the cold air can wait for ten minutes to 30 minutes, because most of the ** air conditioners in the heating, the wind blowing out at the beginning will indeed make people feel cold, at this time the temperature is low, the wind will naturally feel cold, but after the heating is completed, the wind will become hot. If the cold air is still blowing after half an hour, be sure to check whether the use of the air conditioner is appropriate, then you must see if there is any problem with the settings on the remote control, such as whether the heating mode is turned on, and whether the set temperature is more appropriate, do not set it too high, and keep a gap of 4-10 degrees from the outdoor temperature.

Why does the air conditioner start with cold air, but after a while it becomes hot?

The reasons are as follows: 1. Refrigerant leakage. (The performance is that the internal and external units are working, and the compressor is also working, but it has no effect).

2. The compressor capacitor is damaged or defective, resulting in the compressor not working (the phenomenon is similar to the above, but the compressor does not run and overheats). The resistance of the temperature sensor at room temperature changes, causing the air conditioner to not work (the same phenomenon as shutting down when the air conditioner reaches the set temperature). 4. The remote control or air conditioner receiver is not good.

The performance is that the air conditioner is not reflected when it is started, or when it is not working). 5. Four-way valve (single cooler does not have this fault) or high and low pressure gas outlet of the compressor, and the air conditioner works but has no effect (the phenomenon is the same as the previous one). Note: The air conditioner is a fixed-frequency air conditioner.

When the temperature is higher than the set value, the compressor runs, expelling cold air and lowering the room temperature. When the temperature falls below the set value, the compressor stops running. The wind blowing out is hot air.

When using this type of air conditioner, it will be uncomfortable not to place the air outlet in front of the human activity area. Various faults can cause the air conditioner to cool down for a few minutes and then blow natural or hot air. 1. The voltage is too high or too low.

3.Poor heat dissipation of the outdoor unit. Insufficient or excessive refrigerant.

4. The air conditioning control circuit is faulty or detected, resulting in the shutdown of the outdoor unit. 5. The compressor current is too large or the mechanical failure causes the temperature rise in the mold Kaishan to be too high during the operation process, resulting in the thermal protection of the compressor.

Why is the air conditioner turned on for heating, and after a while it is hot, it becomes cold air?

It indicates that the pressure of the air conditioner is working abnormally or the refrigeration dose in the system pipeline is insufficient; When the compressor is abnormal, the compressor starts and stops, the compressor opens, the hot air blows out, the compressor stops, and the fan motor of the indoor unit is turned on when the refrigeration dose in the system pipeline is insufficient, and the coil temperature drops rapidly. Hot air at the beginning, cold air at the back. For details, please call or make an appointment for repair.

Last summer, the air conditioner suddenly blew hot air. Because summer is over, it is not repaired. This summer, turned on the air conditioner as at the beginning of the refrigeration can be normal:

1. The voltage is low.

2. The fins of the condenser of the external unit are too dirty and the ventilation is poor

Air conditioning cooling blowing hot air troubleshooting method:

1. First of all, check whether it is the refrigeration mode, if so, check down;

2. Confirm whether the air conditioner is a heating and cooling machine, if so, see if there is a problem with the four-way valve and engage in the refrigeration situation.

3. If the air conditioner is a single chiller, it is impossible to produce hot air, and the worst is to blow the wind at room temperature.

4. There is another situation that is more dangerous, that is, the heating pipe in the refrigeration and heating machine also works in the case of refrigeration, if this situation occurs, it should be eliminated as soon as possible, otherwise it is very dangerous.

The air conditioner just started to cool down, and after a while, it blew hot air. Hello, the hot air phenomenon that occurs when the air conditioning refrigeration mode is turned on for a period of time should belong to the compressor thermal protection. It can be divided into the main board control circuit failure of the indoor unit of the air conditioner or the four-way valve of the outdoor unit of the air conditioner.

The reasons why the air conditioner is refrigerated first and then heated: 1. Check whether the solenoid valve is damaged, if the reversing valve of the air conditioner is broken, the hot and cold air will be reversed. 2. Check whether the refrigerant is enough, if the refrigerant is seriously insufficient, it will lead to no cold air at all, and even hot air.

3. Check whether the control lines of the indoor unit and the outdoor unit are damaged. 4. The heat dissipation of the air conditioner is poor, resulting in the conversion of the first refrigeration to heating. I hope my answer has helped you, and finally I wish you good health and a happy mood!

Hello, when the air conditioner is heating, there are reasons why cold air will blow for a while and hot air for a while

1.When the air conditioner just starts to heat, there is no wind inside, and it must be preheated to a certain temperature before blowing hot air, and at this time it is cold air.

2.The current temperature reaches the temperature you set, for example, if you set the heating to 26 degrees, when the room temperature reaches 26, stop heating, then the wind blowing out has no temperature, so you think it is cold air.

1. Because of the weather, the general air conditioner needs to be constantly defrosted when it is lower than 5 degrees (outdoor temperature), and the appropriate temperature for human perception is about 25 degrees, that is to say, to feel the heating effect is good, the air conditioning temperature must reach more than 25 degrees to feel warm. Generally, the machine can only reach about 15 degrees.

2. The indoor temperature is still high, and the air supply is not up to the anti-cold air standard, and the internal unit continues to supply air, and the wind at this time is room temperature, which will feel cold. Hope it helps you kiss it