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What is the air conditioning noise caused by?
Don't ignore the sounds coming from your air conditioning system, as this is likely a sign of a problem.
Modern air conditioning systems are becoming more noiseless and more efficient. If you hear an unusual sound coming from your air conditioner, it's probably a sign of a problem that needs attention. Not all noises are caused by serious damage, so don't worry right away if you hear any of the sounds mentioned in this article. First of all, it's important to find out where the noise is coming from and what's causing it. Let's also take a look at the most common cases and what they indicate:
7 air conditioning sounds and what they mean:
It's important to pay attention to your noisy air conditioner, not only because it's very annoying and can worsen your sleep, but also because you likely have a serious problem:
1. The air conditioner makes a buzzing sound
A buzzing sound very often means that there is some kind of electrical problem such as a problem with:
- condenser fan motor
- contactor relay switch
- loose wiring
Electrical problems are dangerous, and you should not try to fix them yourself. It is best to seek help from a professional technician.
2. The air conditioner makes a hissing sound
Most often, a hissing sound means a refrigerant leak. There may be small gaps in the duct or coil where Freon is leaking out. If you hear such a noise from your air conditioner, be sure to turn off the power and seek professional help.
The gaps should be filled, and Freon should be replenished in the system.
3. The air conditioner is making a squeaking sound
A beeping sound from the air conditioner is most likely a signal of a worn belt. This is not a failure that requires complicated repair, but it is important to replace the belt before it breaks.
4. The air conditioner makes a loud high-pitched squealing sound
If you hear excessively frequent squealing sounds, it could signal high pressure in the air conditioner compressor. Usually, the compressor has a sensor that detects high pressure, and the unit shuts off. However, the pressure can reach dangerous levels. So turn off your unit if you hear a loud squealing sound coming from it and contact an air conditioning maintenance company.
5. The air conditioner makes rattling or banging noises
A rattling or rattling sound is usually an indication of a loose or broken part. The damage does not have to be major. It could just be a loose nut or bolt, but it's also possible that it's a loose fan blade.
Louder sounds that resemble banging or banging may indicate a problem with the motor or fan. You can turn off the air conditioner and check for loose components to tighten.
6. The air conditioner makes a clicking sound
The air conditioner makes a slight clicking sound when you turn it on and off, which is normal. However, a loud clicking sound while the unit is running may indicate that there is a problem with the relay or the electrical control. Do not try to handle this case yourself, but seek professional help.
7. The air conditioner makes a rattling sound
A rattling sound could mean there is debris or something else stuck between the fan blades. Although this is not a serious fault, it is a good idea to take precautions so that the engine is not damaged later.
The external compressor of the air conditioner makes sounds
This is the part of the system located outside your home and exposed to the weather conditions. What the different sounds coming from this part of the air conditioner might mean:
- A rattling sound can mean a loose clutch rod, crankshaft or piston pin.
- A whirring sound is probably a sign that there is a loose or burnt contactor.
- A hissing sound almost certainly indicates leaking Freon.
- If you hear a knocking sound, the compressor may have loose parts.
- A humming sound is usually a signal that the compressor motor is damaged or the condenser needs to be replaced.
- When the sound is squeaky, do not put off the check-up but contact an air conditioning technician as there is probably too much pressure in the compressor.
If you hear any of the noises listed, don't pass them by as you almost certainly have some damage to fix. To make sure you don't put yourself in danger, it's best to turn off the unit and seek professional help. Let's note that the surest way to avoid costly repairs is by having regular annual checkups.
You can find a lot more helpful information about air conditioner maintenance on our blog. If you need a new air conditioning system for your home or office, you can check out Fujitsu Airstage models on our website. They offer high energy efficiency, low power consumption and high power output that will provide you with amazing comfort. For more information, contact our team.
