Is Your Ac Making Strange Noises? Here’s What Could Be Causing It


If you have an air conditioner, then you’re probably familiar with the sounds it makes when it’s running as normal. In fact, we often use the noise that an AC makes to determine if it’s working properly! But what do you do if your AC starts making strange noises? In this article, we’re going to talk about some of the most common strange noises from air conditioning Sydney units and why they occur in the first place.

Low refrigerant levels

If your air AC is making strange noises, the problem could be low refrigerant levels. Refrigerant is what cools down the system and keeps it running. When your refrigerant levels are low, your air conditioner will have to work harder and turn on more often which can cause it to make strange noises. You should contact a qualified HVAC technician for air conditioning repairs Sydney or replacement if you suspect this is the problem with your system.

Dirty filters

Dirty filters can cause your air conditioner to make strange noises because the dirty filter will restrict airflow, which in turn makes the compressor work harder and produce more sound. You should clean or replace your filter every month or two depending on how often you run your air conditioner. To clean your filter, take it out of the unit and spray it with water from a hose. You should also vacuum any dust from inside of the filter.

Misaligned Expansion Valves

If your air conditioning Sydney unit is making strange noises, there are a few things you can do. First, check the expansion valve. If it is misaligned, it may be making contact with the condenser or evaporator coil fins which could cause a strange noise. The misaligned expansion valve will also reduce cooling and efficiency of the air conditioner.

Loose fittings

One of the most common causes of strange noises from your air conditioner is loose fittings. These can be in a variety of places, but are often found at the junction where the pipe attaches to the inside unit. You may also hear strange sounds from your system if there are gaps between the pipe and insulation. When you’re cleaning your system, be sure to check these areas for any wear or damage that might be causing those pesky squeaks or squeals.

Water in the Lines/Evaporator Coil

Water in the lines or evaporator coil is one of the most common causes, and luckily it is also one of the easiest problems to fix. To get rid of this problem, turn off the power at the breaker and then open up the unit by unplugging all of your cords.

Faulty Compressor

The most common cause of strange noises coming from an air conditioner is a faulty compressor. This can be caused by different things, such as the wrong refrigerant, too much or not enough refrigerant, a bad bearing, or the wrong voltage.

Is your AC making these noises? It’s time to schedule an air conditioner inspection and fix the repairs before it’s’ too late.

The author is a professional HVAC technician. Along with a team of professionals, he provides air conditioning maintenance, installation, and service. Visit for more details on air conditioning installation in Sydney.

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