Is Your Air Conditioner Making A Weird Noise? Here’s What You Need to Know


Why is my air conditioner making a strange noise? This is one of the questions frequently asked by our clients. Probably your ac is making some noise, and that’s you are here. We wanted to know you the cause of strange noises emanating from your air conditioner and what’s the possible solution to fix it.

See, there are several reasons why an air conditioner makes some strange noise. While it’s okay that air conditioners make some noise when switched on, strange sounds such as clanking, squeaking, etc. are not uncommon. It indicates an underlying issue within your air conditioner that requires professional intervention immediately. Ignoring the sounds can lead to major air conditioning repairs Northern Beaches over time. We advise you to schedule air conditioning service Northern Beaches at least once a year to identify the potential problems within the cooling system and fix it before it escalates to a major issue.

Here are some of the common causes of strange noises from air conditioners:-


If you hear a loud banging noise from your outdoor unit, the problem is probably with the compressor. Ac compressor is responsible for circulating refrigerant. However, due to usage and wear and tear, the parts of the compressor can become loose and create a loud banging noise when it rattles inside the compressors’ outer casing. Unfortunately, you can’t fix it. Yes, in most cases, you’ll need replacement as the compressor is tightly sealed and can’t be opened without damaging the outer layer. Also, it is dangerous to open the compressor all by yourself. You’ll have to call in a professional technician to get it fixed.


Buzzing noise can be heard from both the indoor and outdoor units of your air conditioner. Buzzing sound is a tell-tale sign that indicates that you have an electrical issue. Common electrical AC problems include loose wiring, failing motor, malfunctioning compressor, arcing, and broken capacitor.


Normally, a hissing sound indicates a refrigerant leak. However, it could be a sign of a duck leak, an air filter that doesn’t fit correctly in its slot, and a bad expansion valve. During the operation, the refrigerant runs in a closed loop within the cooling unit. But over time, the thin copper lines and coils that carry refrigerant can form leaks and cause the refrigerant to leak.


Loud squealing and screeching sounds are caused by a faulty blower motor, a bad compressor, and a bad outdoor fan motor. If the sound is coming from an outdoor unit, then a faulty fan motor and a bad compressor are the major causes.

Need help with stopping the noise? Or, air conditioning installation Northern Beaches? Epic Air can help you. Please call us for further queries.

The author is a professional HVAC technician. Along with a team of professionals, he provides installation, maintenance, andair conditioning service Northern Beaches. Visit for more details.

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