Causes and treatment methods of abnormal noise of air conditioners

Reason: The filter screen is too dirty, and the air inlet is blocked, resulting in a noisy air conditioner inside; The inner cover is not tightly covered, resulting in vibration and sound when the air conditioner is working; The sudden change in temperature causes the plastic shell and the internal plastic parts to expand and contract, resulting in sound. Workaround:

Wash the filter; Close the inner lid; No, it's normal. When a certain expansion coefficient is reached, there will be no sound. Air conditioning:

Remove debris from the vents to ensure proper ventilation. Observe whether the outdoor rack is loose, and clean the outdoor ventilation grille for foreign objects. At the same time, keep the vents open.

Clean the surfaces of indoor and outdoor heat exchangers to improve the efficiency of heat exchangers. When cleaning the indoor heat exchanger, the panel should be carefully removed, scrubbed with a soft rag, and gently scrubbed with a small brush to remove dust and harmful deposits that can multiply germs. Remove dust from the filter.

When cleaning the filter, cut off the power supply first, and then open the air intake grille; Remove the filter and clean it with water or a vacuum cleaner. The water temperature should not exceed 40 degrees. Wash with a hot, damp cloth or mild detergent, then wipe with a dry cloth.

At the same time, the filter should not be cleaned with pesticides or other chemical cleaners.

Causes and solutions for air conditioner humming

1: The bracket installation level of the external unit is unstable or the fixing screws of the combined bracket are not tightened and deformed, which will cause the uneven placement of the air conditioner and the noise of the air conditioner during the operation.

Solution: When the indoor temperature reaches the set value, reduce the wind speed of the air conditioner accordingly, reduce the workload of the air conditioning tuyere, and reduce the noise of the air outlet when the operating speed of the air outlet is reduced.

Three: the installation of the indoor unit of the air conditioner and the outdoor unit are connected, and the connection between them will also affect the use of the air conditioner and the operation of the air conditioner outdoor unit, the installation of the indoor unit of the air conditioner is not stable enough, and the indoor unit connected by the copper pipe will be affected by the air conditioning compressor when the air conditioner is running, resulting in the resonance of the indoor unit.

Solution: Adjust the position of the indoor unit, fix the indoor unit of the air conditioner, solve the problem of unstable installation of the indoor unit, and the indoor unit will not resonate with the outdoor unit if the installation is stable.

Four: The reason for the noise of the external unit of the air conditioner may also be that the fan of the external unit rubs against the outer wall of the external unit during operation, and the resulting sound is made, or there is too much debris in the external unit, and the noise caused by friction between the external fan and the external unit.

Solution: Adjust the distance between the fan and the outer wall of the air conditioner in time, if the air conditioner is stuck, add a little lubricating oil to the fan shaft to ensure that the fan rotates smoothly, and clean up the air conditioner in time if there is too much debris.

Fifth: the performance of the air conditioning compressor is poor or aging, it will produce low-frequency vibration sound during the working process, which will also affect people's rest.

Solution: Adjust the compressor or replace the compressor of the air conditioner.

When there is noise inside the air conditioner, you need to remove the air conditioner shell and check the internal parts to see what is the problem. The reasons introduced in the article are only possible factors, and the specific cause of the air conditioner noise needs to be checked before it can be determined.

If noise or other problems are found during the use of the air conditioner, it is recommended that people should find an after-sales air conditioner to investigate and solve it, and it is not recommended to disassemble it by themselves.

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Causes of abnormal noise in the air conditioner:

1. The pressure of the high-pressure pipe in the air-conditioning system is too high.

2. The condenser is too dirty and the heat dissipation is not good.

3. The expansion valve is blocked, and the pipeline generates high pressure.

Air conditioner troubleshooting points:

1. Observe the working conditions of the internal and external units: such as the display of the indicator board, whether the internal unit is working, whether the wind speed output is normal, and whether the external fan and compressor are running, so as to determine whether it is an electrical problem or a system problem caused by the lack of refrigeration.

Judgment of air conditioning failure:

1. Refrigeration system: observe whether there are cracks, damage, frost and condensation in each pipeline of the refrigeration system; Whether there is any collision and friction between the refrigeration pipelines, pipelines and shells, especially the welding of refrigerant pipelines, whether there is leakage at the joint connection, where there will be oil stains at all leaks, you can also use a clean soft cloth and soft paper to wipe the connection between the welding place of the pipeline and the joint, and observe whether there is oil stain to judge whether there is leakage.

2. Electrical system: observe whether the fuse of the electrical system is fused, whether the insulation of the electrical wire is intact and undamaged, whether the circuit board is broken, whether the connection is loose, etc. In particular, whether the electrical connection is in good contact, the wiring screws and plug-in parts are easy to loosen and cause poor contact.

3. Ventilation system: observe whether the air filter, heat exchanger coil and fin accumulate too much dust; whether the air inlet and outlet are unblocked; whether the fan and fan blades are operating normally; whether the wind is normal, etc.

1. Clean the filter screen regularly (should be cleaned once every half a month), if the filter screen 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 cannot 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. Check whether the inner cover is tightly covered, sometimes the inner cover is not tightly covered after cleaning the filter screen or after cleaning, resulting in the vibration and sound of the air conditioner when working;

3. In order to make the room heat up (cool down) quickly when the air conditioner is just turned on, use the high-efficiency key, the indoor unit runs at high speed, and the noise may be a little louder.

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 thus make a "click" sound, which is a normal situation.

5. During the operation of the air conditioner, it will emit sounds similar to running water, gas (the sound of the reversing valve reversing instantaneously when the machine defrosts in winter), and the sound of boiling the pot (the sound of freon entering the indoor evaporator), which can be interpreted as the sound of refrigerant flowing in the machine and the sound of freon reflux in the machine, which are normal sounds and not noise.

6. If the air conditioner is noisy, after eliminating the above reasons, the fault is still there, you should find a professional maintenance personnel for maintenance.

Air conditioning can refrigerate and heat: when cooling, the refrigerant flows in the pipes, and the boiling point of the refrigerant changes due to the different pressures of the pipes. Therefore, the refrigerant boils indoors to absorb heat, cools and dissipates heat outdoors, and completes the transfer of indoor heat to the outdoors, so the indoor cools down.

The principle of heating is actually the same as that of refrigeration, except that the direction of refrigerant flow is reversed. The refrigerant boils outdoors to absorb heat, and then dissipates heat indoors to achieve the purpose of heating.

Extended Materials. On the other hand, there is no need to worry about the lack of heat when the air conditioner is cooling. When heating, there may not even be much heat outside, so it is more difficult for the air conditioner to work.

Is it possible to overcome this difficulty? Of course, you can, as long as you replace a better compressor and speed up the flow of refrigerant. Since the heat of a single handling is not enough, it can be made up by increasing the number of handling, which can also ensure work efficiency.

However, high-quality compressors are expensive and technology is scarce. Therefore, most domestic brand air conditioners will not be equipped with this compressor for heating. More often than not, we use electric auxiliary heating technology.

There are two types of abnormal noise of air conditioning, external abnormal noise and internal abnormal noise.

1.The latter is due to the presence of air or moisture in the refrigerant of the system, which produces abnormal noise when the refrigerant evaporates and expands.

2.The former is what you call a phenomenon, and this kind of abnormal noise is generally because the refrigerant components contain air and moisture, but if you add 3If there is still abnormal noise after refrigerant, it is most likely due to damage to the internal mechanical structure of the compressor.

4.If it is after a period of time** and the location is inside the center console, there is a high possibility that the efficiency of the dryer will be reduced.

If there is an abnormal noise when the air conditioner is turned on, this abnormal noise can be solved by yourself.

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The causes and treatment methods of abnormal noise of air conditioners are as follows:1. If there is a foreign body in the air duct, take out the foreign body in the air duct.

2. If the compressor is damaged or the pipeline is blocked, the solution is to repair or replace the compressor.

3. If the generator or air conditioning belt or tensioner bearing causes abnormal noise, the solution is to replace the air conditioning belt or belt tensioner.