The air conditioner doesn t turn on, the internal unit keeps buzzing, what s wrong?

The reason why the air conditioner is humming loudly:

First, the installation problem. Specific reasons: the indoor unit is not tightened, resulting in resonance between the body and the wallboard; The air filter is not jammed.

Second, the reason for the machine itself. Specific reasons: caused by the deviation of the center of gravity of the cross-flow fan; cracked inner fan; Caused by defective motor bearings, there is AC sound; Transformer AC sound.

3. The external reason may be the wall structure problem, if it is installed on the hollow wall, there will also be abnormal noise.

Fourth, the filter screen is too dirty, and the air inlet is blocked, which will not only make the internal machine noisy.

The maintenance method of the air conditioner with a loud buzzing sound:

First check whether the indoor unit is hung tightly, the filter screen is carded, confirm that everything is normal, and then listen carefully to this sound, suspect that it is the AC sound of the internal fan motor, but after replacing the new fan motor, there is still a buzzing sound, and the phenomenon is still the same, replacing the transformer is also useless, inadvertently, I found that there is a slight vibration when I touch the online pipe, I hold down the wall side to listen, and there is no instantaneous sound, which is found to be the user's hollow wall that causes the wall and the pipeline to resonate. Resonate, adjust.

The cold air of the air conditioner is blown out of the air conditioner filter, and if it is too dirty, the cold air will not be blown out, so it needs to be cleaned.

If the rigidity of the chassis is poor or the fan motor is not adjusted well during installation, the chassis can be pulled out, and the installation position of the fan motor can be readjusted until it is not touched, and then it can be tightened.

1. The sound of the flow of refrigerant, it may be that your air conditioner is overcharged and cannot evaporate completely. Such a sound may also be present when a normal air conditioner is activated.

2. There are things stuck on the fan blade or evaporator, such as wire tie and the like, which causes abnormal noise when the fan blade is running.

3. The fan blade screw is loose or falls off, causing the fan blade to not rotate normally.

The air conditioner is assembled from metal parts and plastic, and the expansion coefficient of these two materials is different, so the temperature changes abruptly with the start and stop when the air conditioner is working, and the different expansion coefficients of metal and plastic make them misalign with each other and produce such a sound.

First of all, check whether the fan of the indoor unit is running normally, whether the power supply voltage of the indoor unit is normal, and check whether the starting capacitance of the outdoor unit is abnormal.

Maybe it's because of the cold weather. There is also a specific environment for the use of air conditioning.

Reason: First of all, the influence of the power supply is excluded (the left zero and the right fire in the socket come to the ground wire, because the reverse connection of the power supply zero live wire will affect the filtering effect of the air conditioning filter circuit); Then exclude the resonance echo caused by the loose fixation of the transformer, displacement, and gap in the casing buckle; Finally, there is still the sound of current caused by the poor quality of the transformer. Another point that is easy to overlook is the installation position of the internal machine, some of which will amplify the noise of the machine.

The specific reason also needs to be inspected by an experienced master on site.

It should be explained here that although the biggest advantage of switching power supply is that it is silent, efficient, and low-cost. But the only drawback is that the long-term live 100 working life is significantly worse than that of the transformer, and the stability is also worse than that of the transformer. In order to reduce the failure rate, all air conditioning manufacturers use transformers with more stable performance, and the external power supply of inverter air conditioners is switched power supply.

When the air conditioner is powered on and not turned on, the internal unit keeps buzzing, what's wrong? I think the air conditioner is not turned on, but you have electricity plugged in to the socket all the time. So the internal unit of the air conditioner must be on the electricity, so it will buzz all the time.

This is because the internal machine has no way to operate and connect with the control of the external machine in the working process, at this time, the internal machine is turned off first, and then the circuit is judged.

Summary. 1. First of all, it may be that the stepper motor is reset. Because some air conditioners do not add the function of automatic reset, the stepper motor will reset after the air conditioner is not turned on, so that the air conditioner leaves can be fully compliant, the whole process will last 3-5 minutes, and then the sound will disappear, if this is a normal phenomenon, do not worry about it.

2. The second is that there is water accumulation in the condenser tube. If the condenser pipe is not disposed of during installation, the water generated during its operation can not be discharged in time, when the air conditioner is not turned on, there will be a sound inside, the general sound is the sound of dripping, the condenser pipe can be checked, and the stagnant water can be discharged to return to normal.

3. Finally, it may be a compressor or motor failure. If the sound appears in the center console, it is usually a failure of the internal and external circulation motors, and sometimes a problem with the heating and cooling switches. If the sound is from the outside, there is a high chance that the compressor or blower will fail, both of which will need to be serviced by an air conditioning professional.

Hope mine is helpful to you<>

The air conditioner didn't turn on and the outside unit buzzed on its own.

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The air conditioner is not turned on and the outside unit works for any reason.

1. First of all, it may be that the stepper motor is reset. Because some air conditioners do not add the function of automatic resumption, the stepper motor will reset after the air conditioner is not turned on, so that the air conditioner leaves can be fully compliant, the whole process will last 3-5 minutes, and then the sound will disappear, if this is a normal phenomenon, do not worry about it. 2. The second is that there is water accumulation in the condenser tube.

If the condenser pipe is not disposed of during installation, the water generated in the process of operation can not be discharged in time, when the air conditioner is not turned on, there will be a sound inside, the general sound is the sound of dripping, the condenser pipe can be checked, and the stagnant water can be discharged to return to normal. 3. Finally, it may be a compressor or motor failure. If the sound appears in the center console, it is usually a failure of the internal and external circulation motors, and sometimes a problem with the heating and cooling switches.

If the sound is from the outside unit, there is a high chance that the compressor or blower will fail, both of which will require the maintenance of the air conditioning professional. Hope mine is helpful to you<>

The reasons may be:

1. When the air conditioner starts or stops, it is normal for the plastic parts of the inner machine to expand and contract due to temperature changes. There are also some pipelines that are deformed due to thermal expansion and contraction and are attached to the compressor or metal shell to cause resonance, so don't be too anxious at this time.

2. Whether the fixed wall of the internal and external machine is strong, and the loose or deformed wall fixing screws are easy to lead to this situation.

3. Check whether the indoor and outdoor connecting pipes are fixed and whether there is any collision with the outdoor unit or other objects.

4. When the air conditioner is started or stopped, the refrigerant in the system will make a loud flow sound before reaching the equilibrium, which is a normal phenomenon.

5. If the outdoor unit is too dirty, clean it with water after the power is off!

6. When the fan is running, it rubs against the outer wall, and the distance between the fan and the outer wall should be adjusted in time. In addition, it is also possible that the fan is stuck, add some lubricating oil to the fan shaft of the air conditioner to ensure that the fan rotates smoothly.

7. Resonance occurs due to the aging of the compressor gasket because the gasket hardens, or the compressor itself is noisy (this possibility is very small).

1.The noise of the indoor unit is mainly caused by the infirm installation of the indoor unit, the resonance or the indoor extension is not fixed firmly, or the locking screws of the cross-flow fan blade and motor shaft are loose.

2.Gently push each part of the air conditioner with your hand to see if the noise of the indoor unit is reduced or absent. If there is still one, remove the inner shell to observe whether the indoor extension motor is firmly fixed, whether the through-flow fan blade has axial channeling, if so, please fasten.

3.If the noise is obvious and the whistling sound is harsh, then the motor bearing of the fan is damaged and the motor bearing needs to be replaced.

1. When the air conditioner is used for a long time, the panel of the air conditioner is easy to loosen due to various reasons, so that the vibration generated by the air conditioner during operation will make the panels rub against each other, resulting in noise.

2. The installation of the indoor unit of the air conditioner and the connection of the outdoor unit also affect the timing, use and noise of the air conditioner. If the installation of the indoor unit is not stable enough, when the outdoor unit is running, the copper pipe is connected to the indoor unit, and the indoor unit is not stable enough, it will be affected by the compressor, resulting in the resonance of the indoor unit.

3. The air conditioning compressor is also one of the most important air conditioning noises, and the noise value of the compressor is too large, which will also affect the use and rest of our normal users.

4. When the air conditioner is turned on, the greater the wind speed, the noise value of the air conditioner will gradually increase, which is one of the main noise values of the air conditioner.

The air conditioner is buzzing in the room, which may be the sound of you only being able to flow air, just like the sound of a refrigerator, which is normal.

Hello, about your question, I think the noise after the air conditioner starts is mainly the working noise of the compressor, and it does not belong to the fault. Because the compressor works intermittently and is not always working, it will make a loud working noise when it is started again. If the key door is opened, the automatic operation of the air conditioner is definitely abnormal, and most of the cases are the failure of the fan control module, and new accessories need to be replaced.

Extended information: air conditioning noise analysis: 1. Whether the filter is cleaned regularly (should be cleaned once a week), if the filter is too dirty, the air inlet is blocked, which will not only make the internal machine noisy, vibrate, the wind sound is low, and the wind speed can not be raised, and when the outdoor ambient temperature is not too low, it will make the indoor unit evaporator overheating protection and frequent standby, generally about 10 minutes.

2. Whether the inner cover is tightly covered, sometimes the user does not cover the inner unit tightly after cleaning the filter screen or after cleaning, resulting in a loud vibration of the indoor unit of the air conditioner during work. 3. When the air conditioner is just turned on, in order to make the room heat up (cool down) quickly, use the high-efficiency key, the indoor unit runs at high speed, the noise may be a little bigger, and after working for a period of time, the air conditioner will turn into normal operation, and the sound will naturally be smaller; In general, the high-efficiency function will automatically stop after 15 minutes of operation. 4. When the air conditioner is running or after the shutdown, due to the sudden change in temperature, it may lead to the thermal expansion and contraction of the plastic shell and the internal plastic parts, and therefore make a "click" sound, which is a normal situation. When the machine stops running, it will make a rattle sound due to the temperature difference, which is likely to happen to all air conditioners, so you don't have to worry.

If it is heating, the external machine starts for a while, and the internal machine starts to blow the air, and the buzzing sound is the sound of the external machine starting and transmitting to the room; If it is refrigeration, it is estimated that the air conditioner must first open the air outlet and the sound of the stepper motor.

Centrifugal fan does not have something to live with.

The reason for the humming sound of the indoor unit of the air conditioner may be the resonance caused by the loosening of the indoor cover when the air conditioner is working, and it should be solved by closing the cover again. Air conditioning noise is the noise emitted by the air conditioning system when it is working, including the noise generated by the fan escaping into the room, the regenerative noise at the end of the air duct, the noise generated by the fan, the modulated noise and the random noise caused by the vortex when the blades rotate against the surrounding air. Air Conditioner Noise Treatment Method:

1. The compressor emits abnormal vibration and noise. The compressor base uses a spring vibration isolation structure, and the user should first pull out the chassis and relax the nut before installing the air conditioner, so that the spring can play a vibration isolation role during the operation of the compressor and reduce its vibration and noise. There are also a small number of compressor internal parts touching the shell, when running, there is an intermittent metal knocking sound, and when this fault is encountered, it can only be repaired by opening the shell.

2. The air conditioner emits other crashing sounds. During the operation of the air conditioner, the fan set screw is loose, which causes the fan to shift and generate noise. If the chassis rigidity is poor or the fan motor is not adjusted well during the installation process, and this fault is encountered, the chassis can be withdrawn, and the installation position of the fan motor can be readjusted until it is not touched, and then it can be tightened.

1. There is noise in the air conditioner.

In the production process of some air conditioners, poor materials, production line employees cut corners, quality inspectors work sloppily, etc., may cause quality problems, and similarly, in the process of transportation and handling, there may also be quality damage. Some household air conditioners have very high requirements for packaging protection, and the packaging box has a tight foam for filling and fixing, so the probability of noise is relatively small.

2. Why is there noise in the air conditioner?

1. Failure to clean in time.

Long-term use of air conditioners, if they are not cleaned, will cause dust to accumulate on the air conditioner radiators, which will inevitably affect the operation of the air conditioner and bring a series of problems. For example, the heat dissipation is blocked, the air circulation of the internal unit is not normal, and so on. Problems caused by the accumulation of dust on the radiators will cause the operation of the air conditioner to produce noise.

2. Quality is the key.

If the air conditioner produces noise during operation, one of the important reasons is that the air conditioner itself has quality problems. In this case, noise is inevitable in the operation of the air conditioner.

3. The design and installation are too sloppy.

When some air conditioners are installed, they often choose the "full ceiling" installation. This is not only for the aesthetic aspects of the installation, but also for the sake of reducing the noise generated during the operation of the air conditioner. However, many air conditioner designers and installers do not design well or design well but do not install it well due to the technical problems of the installers in the process of installing air conditioners, so that the air conditioner produces noise during operation.

4. Compressor quality problems.

The compressor is the heart of the air conditioner, the quality of the compressor directly determines the noise of the air conditioner, and the quality of the compressor directly controls the use effect of the air conditioner. The noise generated during the operation of the noise air conditioner is mainly generated by the internal evaporator and the external condenser.