The most common reason for an air conditioner to make pulsating noise is loose parts. However, depending on assumption may not be the best way to start a repair. So, it’s always wiser to find out the exact problem that’s causing the sound. In this way, you can properly fix whatever problems are creating unwanted noise.
Air Conditioner Making Pulsating Noise – Why?
These days, highly efficient sound dampening technology and two-stage compressors are a vital part of the manufacturing process of air conditioners. As a result, they barely make any noise. However, if your air conditioner is making an unusual pulsating noise then it’s probably best to get that checked.
Generally, most air conditioners make a little to no noise while operating. So, a pulsating noise may signal a malfunctioning part of the air con. Mostly, it’s because of a loose part or panel. Sometimes, an inside part of the aircon comes loose while operating. So, when it vibrates, it creates a pulsating noise.
Some common parts may be responsible for this. For example, a fan blade or coil fan could be the origin of the noise. Also, sometimes, the noise originates from the main motor. When the fan motor wobbles, it may create sound. However, to stop the noise, you have to fix or even replace the loose parts.
Faulty Refrigerant Line
Now, loose parts are not the only thing responsible for air conditioners making pulsating noise. Sometimes, the refrigerant line comes in contact with the wall while passing through it. So, when it wobbles, it may clash with the wall and make pulsating noise.
One way to fix this problem is by stuffing foam or rubber insulation between them. So, the line won’t bump into the wall and make the unwanted noise anymore. You can do this yourself without any professional help. Just put the line away from the wall and place the stuffing into the empty space. And, it’s done!
Split Ac Indoor Unit Making Pulsing Noise
For a multi-split air conditioner, sometimes the indoor unit may act up and make pulsing noise. These sounds may originate from a loose or broken part, such as a blower wheel, connecting belt, fan motor, etc. As a result, the unit may make a squealing or shrieking noise.
Damaged or Broken Parts
If the air conditioner has broken or damaged fan motor parts, it’s most likely to make a pulsing noise while operating. Sometimes the compressor of the condenser system makes unsettling noise because of damaged blower in the motor. The only way to stop the noise is fixing the engaging parts or replacing them with new ones.
The indoor unit of an air conditioner continuously vibrates while operating. So, the inside parts may come loose from their original place. These loosen parts interact with the inside of the unit and make a loud clanking noise. For example, the connecting belt or bearings of the motor may slip because of vibration.
If the unit is comparatively new, it’s more likely that the problem is with the bearings of the condenser. Simply fixing these parts in their original places will stop these sounds. If you are not familiar with how to fix these problems, seek professional help to avoid further damaging the parts.
Air Conditioner Making Pulsating Noise and Not Cooling
We’ve already discussed air conditioners making pulsating noise. It’s mostly because of broken or loose parts that create unwanted noise. Simply fixing or replacing these parts will stop the noise. However, another common problem that comes with it is the temperature not going down.
If the thermostat is set to cool and the compressor is running, but the temperature is not going down. Then you may have a problem. Firstly, make sure that there is something wrong with the air conditioner. It will prevent the chance of damaging the air-con further.
For that, close any door and windows, turn off any humidifier, make sure the temperature is below the room temperature and that the vents are open. If the air conditioner is still not cooling then you can try to find out the problem.
Blocked Air Condenser
A dirty or blocked air condenser is the most common reason for the air conditioner not cooling. Make sure the outside unit is clean to prevent any air blockage. Clear away any dirt or debris that’s inside them
Clogged Air Filter
The air filter can also get clogged up sometimes, if you have pets, their hair and fur can get into the filter. Also, dirt and debris can block the air filter if you use the air con frequently. Clean these pieces of stuff out of the filter for proper air cooling.
If cleaning the filter and condenser doesn’t fix the cooling problem, then you are more likely to have a problem with the refrigerant. Sometimes, there are small leaks of refrigerant that cause in old air conditioners. In this case, you may need professional help to fix the problem.
Air Conditioner Making Vibrating Noise
Vibrating noises in air conditioners are made of, well, excessive vibration of any inside parts. This sound may signal a mechanical problem inside the air conditioner unit. If the compressor or fan motor face any mechanical failure, it may cause long vibration causing a vibrating sound.
Besides, a loose part may also be responsible for this. In this case, generally, the loosened parts chatter with other parts and create these sounds.
Air Conditioner Surging Sound
Another very common problem with air conditioners is making surging sounds. Surging sounds are mainly caused by electrical components. When any electrical wiring malfunctions, it can cause a buzzing and surging sound inside the air conditioner.
If you are facing this problem, make sure to get it checked as soon as possible. Electrical problems can lead to frequent short circuits and lead to even bigger problems. So, ignoring it for longer is just going to add to future expenses. Also, seeking professional help is recommended.
Frequently Asked Question
Q: How do I stop refrigerant leakage?
Ans: If the leak is in the valve, clean the valve thoroughly and connect the leaking part. However, it’s better to just replace the refrigerant coils.
Q: Can an air conditioner unit overheat?
Ans: Yes. If the refrigerant leaks out, the air conditioner unit can overheat and fail to cool the inside of the home.
Today’s air conditioners are quieter than ever. Some of them may still make a little noise. However, if the noise nearly bothers you then it’s probably best to look for the reason. Continuing to run the air conditioner without fixing the problem is most likely to cause an even bigger problem which will only add to future expenses.
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