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Understand Your Air Conditioning Unit

Close-up of worker connecting pipes to air conditioner

It’s always a good feeling when you have a basic understanding of how things work in your own home.  The more you know about your air conditioner, the more likely you’ll know how to maintain it and what to do if something goes wrong. Of course, if you understand your unit and keep it regularly serviced, nothing should go wrong.  So, if you’ve always wondered how air-conditioners really work, here is our handy, simple guide for everyday users.

How Do Air Conditioners Work?

Air conditioners work by collecting hot air and cooling it down using refrigerant and coils. The cold air is then released into the space that’s needed to be cooled through air vents.

What are the Main Parts of an Air Conditioner?

The main parts of most air conditioners that you need to know about include:


The evaporator collects heat through the refrigerant mentioned above. This is done through a heat exchanger coil which is the evaporator.

The Condenser

The condenser takes the vaporised refrigerant, and sends the heat outside. The condenser is generally located in the unit outside the building.

Expansion Valve

This is what keeps track of the amount of refrigerant going towards the evaporator. You’ll find the expansion valve between two sets of coils.

Condenser Coils

The coils are an essential part of the outside unit as they release the heat into the atmosphere. If your condenser coils aren’t working properly, it will cause your air conditioner to overheat, thus tripping the outside power circuit board or simply functioning inefficiently.

Exhaust Fan

The exhaust fan in the outside unit aids the condenser coils in the pushing of the hot air out into the open atmosphere.


It is important to note that refrigerant in your air conditioner shouldn’t need replacing unless there’s a leak in your system. There’s a common misconception that because a refrigerant is a fluid, that it must need to be replaced. However, in most cases, the refrigerant transforms into a gas and then transfers back into a liquid state during the cycle of refrigeration. If you think your air conditioner is running low on refrigerant, it’s important to seek out the cause of this.

Maintaining All Parts Is Important

Every part of your air conditioner has a vital use, so it’s important to check on and maintain these parts before a minor problem becomes a big one.

At The Weather Wizard, we know that if it’s not your area of expertise, understanding and maintaining an air conditioner can be tricky to do yourself. That’s where you need the wizards to work their magic! We are dedicated air conditioner specialists, servicing Perth and beyond.

We believe in listening to, and working with our clients to help them understand what we’re doing and why we’re doing it. If you need help deciding which air conditioner system will suit your home or business, contact us today. Alternatively, call us on (08) 9303 4000.