Why DIY Air Conditioning Installation Isn’t Worth the Risk
Date Published: April 30, 2025, Last Updated on April 30, 2025 by Dan Thompson
Installing your air conditioning unit can be tempting, especially if you’re trying to cut costs or enjoy the satisfaction of a DIY project. But before you grab your tools, there’s a lot to consider.
In this guide, we share expert advice on what’s involved in do-it-yourself air conditioning installation. We explain what you can do to prepare for an installation and why you should leave the rest to the licensed professionals.
If you’re looking for help with air conditioning in Eastern Suburbs, Eastern Melbourne Electricians is just a call away.
What Type of Air Conditioning Can You Install Yourself?
Let’s get one thing clear: not all AC installations are suitable for DIY. In fact, many require licensed electricians or refrigeration mechanics, especially if you’re handling refrigerants or electrical wiring.
Here are common types of systems and their DIY suitability:
Portable air conditioners
These AC units are plug-and-play, and they are ideal for DIY. Just follow the manufacturer’s installation instructions, set it near a window, and vent the exhaust hose properly.
Window-mounted air conditioning units
Window-mounted units can be installed by confident DIYers, but still require proper support and positioning. A poorly mounted air unit can fall, leak, or run inefficiently.
Split system air conditioners
Not recommended. While it may look simple, installing a split system involves electrical wiring and handling of refrigerant gases, both of which legally require licensed professionals in Australia.
Attempting a DIY installation of a split system air conditioner can not only void your warranty but may also pose safety risks and lead to fines for non-compliance. It’s always best to hire a professional and qualified technician to ensure the system is installed safely and efficiently.
Tip: If your air conditioning unit makes strange odours during operation, it could be more than a filter issue. Find out why your air conditioner might smell musty and how to fix it fast.
Ducted air conditioning systems
Definitely not a DIY job. Installing ducted systems involves complex ductwork, electrical connections, and often modifications to ceilings or roof spaces. It also requires licensed professionals to handle the electrical and refrigeration components.
Improper installation can lead to poor performance, higher energy bills, and even damage to your home — it’s essential to leave this one to the experts.Not sure which type is right for you? Our breakdown of ducted vs. split-system air conditioning can help you weigh the pros and cons for your space and budget.
Why Most Air Conditioning Installations Shouldn’t Be DIY
DIY projects can be satisfying, but installing an air conditioner isn’t like hanging a shelf. Split system air conditioning and ducted systems involve electrical wiring, refrigerant gas handling, and strict compliance regulations.
Here’s what the law says in Australia:
All electrical work must be carried out by a licensed electrician, as outlined by national safety guidelines on electrical hazards in construction (Safe Work Australia).
Any work involving refrigerant gases, such as connecting indoor and outdoor units of a split system, requires an ARCtick licence from the Australian Refrigeration Council.
Breaking these rules can lead to:
Voided manufacturer warranties
Cancelled home insurance
Serious injury or property damage
Tip: Thinking of buying a new unit? Make sure it’s energy-efficient. Check out our guide to choosing an energy-efficient air conditioner to find the best option for your home.
What You Can Safely Do Yourself
While the core installation should always be left to a professional, there are still a few things you can do to prepare your home and potentially reduce installation time.
Clear the area where the indoor and outdoor units will be installed
Mount indoor brackets or mark positions (but don’t connect any wiring)
Install window kits for portable air conditioners
Assist with duct layout prep (without touching electrical components)
These small tasks can help streamline the installation process, but always check with your installer first.
Pre-Installation Checklist:
Confirm your chosen unit is compatible with your space and energy needs
Ensure access to the proposed location is clear
Take note of power points or existing wiring (for reference, not modification)
Locate the best drainage point if using a window or portable unit
The Real Cost of DIY Air Conditioning Installation
DIY air conditioner installations often look cheaper on paper, but the hidden installation costs can quickly grow. From replacing incorrectly installed units to repairing unsafe or non-compliant electrical work, the savings can quickly vanish.
Many homeowners end up paying a licensed electrician to redo the job properly, especially after voiding manufacturer warranties or damaging walls, wiring, and insulation during the process.
In some cases, poor installation has led to complete system failure, costing more than double the price of a professional installation.
Still Keen to Help? Here’s How to Do It Safely
If you still want to lend a hand, talk to your technician first. Here are safe ways to stay involved:
Assist with lifting and mounting the indoor unit
Help seal gaps or prep installation sites
Cut vents or ceiling holes (if approved beforehand)
Tidy the workspace post-install
But remember: handling wiring, refrigerant lines, or power connections is strictly licensed work.
Is your system already installed but acting up? Look out for these 5 Signs Your Air Conditioner Needs Service.
Leave It to the Pros – We’ve Got You Covered
While DIY might seem doable, air conditioning installation is one job where calling a pro is the smart move.
At Eastern Melbourne Electricians, we’re fully licensed and experienced in handling everything from split systems to full ducted setups.
We service Bayswater, Croydon, and all surrounding Eastern Suburbs with fast, reliable, and fully compliant installations.Avoid the risks, call us at 1800 851 129 or get in touch online to book your air conditioning installation today.
